23815172 has 6 divisors (see below), whose sum is σ = 41676558. Its totient is φ = 11907584.

The previous prime is 23815171. The next prime is 23815199. The reversal of 23815172 is 27151832.

It can be written as a sum of positive squares in only one way, i.e., 16760836 + 7054336 = 4094^2 + 2656^2 .

It is not an unprimeable number, because it can be changed into a prime (23815171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2976893 + ... + 2976900.

It is an arithmetic number, because the mean of its divisors is an integer number (6946093).

Almost surely, 2^23815172 is an apocalyptic number.

It is an amenable number.

23815172 is a deficient number, since it is larger than the sum of its proper divisors (17861386).

23815172 is a wasteful number, since it uses less digits than its factorization.

23815172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5953797 (or 5953795 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 23815172 is about 4880.0790977196. The cubic root of 23815172 is about 287.7075381128.

The spelling of 23815172 in words is "twenty-three million, eight hundred fifteen thousand, one hundred seventy-two".