23031512 has 32 divisors (see below), whose sum is σ = 50949120. Its totient is φ = 9551520.

The previous prime is 23031499. The next prime is 23031517. The reversal of 23031512 is 21513032.

It is a super-2 number, since 2×23031512² = 1060901090012288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23031517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4898 + ... + 8369.

It is an arithmetic number, because the mean of its divisors is an integer number (1592160).

Almost surely, 2^23031512 is an apocalyptic number.

It is an amenable number.

23031512 is an abundant number, since it is smaller than the sum of its proper divisors (27917608).

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

23031512 is a wasteful number, since it uses less digits than its factorization.

23031512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13311 (or 13307 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 23031512 is about 4799.1157518860. The cubic root of 23031512 is about 284.5165168840.

Adding to 23031512 its reverse (21513032), we get a palindrome (44544544).

The spelling of 23031512 in words is "twenty-three million, thirty-one thousand, five hundred twelve".