25320172 has 6 divisors (see below), whose sum is σ = 44310308. Its totient is φ = 12660084.

The previous prime is 25320143. The next prime is 25320187. The reversal of 25320172 is 27102352.

It is a super-2 number, since 2×25320172² = 1282222220219168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3165018 + ... + 3165025.

Almost surely, 2^25320172 is an apocalyptic number.

It is an amenable number.

25320172 is a deficient number, since it is larger than the sum of its proper divisors (18990136).

25320172 is a wasteful number, since it uses less digits than its factorization.

25320172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6330047 (or 6330045 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 25320172 is about 5031.9153411002. The cubic root of 25320172 is about 293.6447341549.

The spelling of 25320172 in words is "twenty-five million, three hundred twenty thousand, one hundred seventy-two".