31797625 has 16 divisors (see below), whose sum is σ = 40015872. Its totient is φ = 25225200.

The previous prime is 31797617. The next prime is 31797629. The reversal of 31797625 is 52679713.

It is not a de Polignac number, because 31797625 - 2³ = 31797617 is a prime.

It is a super-2 number, since 2×31797625² = 2022177911281250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31797629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14874 + ... + 16876.

It is an arithmetic number, because the mean of its divisors is an integer number (2500992).

Almost surely, 2^31797625 is an apocalyptic number.

It is an amenable number.

31797625 is a deficient number, since it is larger than the sum of its proper divisors (8218247).

31797625 is a wasteful number, since it uses less digits than its factorization.

31797625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145 (or 2135 counting only the distinct ones).

The product of its digits is 79380, while the sum is 40.

The square root of 31797625 is about 5638.9382865926. The cubic root of 31797625 is about 316.8095231095.

The spelling of 31797625 in words is "thirty-one million, seven hundred ninety-seven thousand, six hundred twenty-five".