23021512 has 16 divisors (see below), whose sum is σ = 44169840. Its totient is φ = 11242896.

The previous prime is 23021507. The next prime is 23021513. The reversal of 23021512 is 21512032.

It is a super-2 number, since 2×23021512² = 1059980029532288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23021513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33118 + ... + 33805.

It is an arithmetic number, because the mean of its divisors is an integer number (2760615).

Almost surely, 2^23021512 is an apocalyptic number.

It is an amenable number.

23021512 is a deficient number, since it is larger than the sum of its proper divisors (21148328).

23021512 is a wasteful number, since it uses less digits than its factorization.

23021512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66972 (or 66968 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 23021512 is about 4798.0737801747. The cubic root of 23021512 is about 284.4753330623.

Adding to 23021512 its reverse (21512032), we get a palindrome (44533544).

The spelling of 23021512 in words is "twenty-three million, twenty-one thousand, five hundred twelve".