23515172 has 12 divisors (see below), whose sum is σ = 42570780. Its totient is φ = 11352096.

The previous prime is 23515171. The next prime is 23515189. The reversal of 23515172 is 27151532.

It can be written as a sum of positive squares in 2 ways, for example, as 4990756 + 18524416 = 2234^2 + 4304^2 .

It is not an unprimeable number, because it can be changed into a prime (23515171) 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, 101243 + ... + 101474.

It is an arithmetic number, because the mean of its divisors is an integer number (3547565).

Almost surely, 2^23515172 is an apocalyptic number.

It is an amenable number.

23515172 is a deficient number, since it is larger than the sum of its proper divisors (19055608).

23515172 is a wasteful number, since it uses less digits than its factorization.

23515172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202750 (or 202748 counting only the distinct ones).

The product of its digits is 2100, while the sum is 26.

The square root of 23515172 is about 4849.2444772356. The cubic root of 23515172 is about 286.4943444838.

The spelling of 23515172 in words is "twenty-three million, five hundred fifteen thousand, one hundred seventy-two".