31201230 has 96 divisors (see below), whose sum is σ = 82076544. Its totient is φ = 7584192.

The previous prime is 31201229. The next prime is 31201231. The reversal of 31201230 is 3210213.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31201229) and next prime (31201231).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31201231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 465657 + ... + 465723.

It is an arithmetic number, because the mean of its divisors is an integer number (854964).

Almost surely, 2^31201230 is an apocalyptic number.

31201230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31201230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41038272).

31201230 is an abundant number, since it is smaller than the sum of its proper divisors (50875314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31201230 is a wasteful number, since it uses less digits than its factorization.

31201230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 31201230 is about 5585.8061190843. The cubic root of 31201230 is about 314.8163202269.

Adding to 31201230 its reverse (3210213), we get a palindrome (34411443).

The spelling of 31201230 in words is "thirty-one million, two hundred one thousand, two hundred thirty".