31172025 has 12 divisors (see below), whose sum is σ = 51537872. Its totient is φ = 16625040.

The previous prime is 31171993. The next prime is 31172039. The reversal of 31172025 is 52027113.

It is not a de Polignac number, because 31172025 - 2⁵ = 31171993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31171992 and 31172010.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207739 + ... + 207888.

Almost surely, 2^31172025 is an apocalyptic number.

It is an amenable number.

31172025 is a deficient number, since it is larger than the sum of its proper divisors (20365847).

31172025 is a wasteful number, since it uses less digits than its factorization.

31172025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415640 (or 415635 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 31172025 is about 5583.1912917255. The cubic root of 31172025 is about 314.7180646904.

Adding to 31172025 its reverse (52027113), we get a palindrome (83199138).

The spelling of 31172025 in words is "thirty-one million, one hundred seventy-two thousand, twenty-five".