31995725 has 12 divisors (see below), whose sum is σ = 39747456. Its totient is φ = 25549680.

The previous prime is 31995709. The next prime is 31995727. The reversal of 31995725 is 52759913.

It is not a de Polignac number, because 31995725 - 2⁴ = 31995709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31995727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20834 + ... + 22316.

It is an arithmetic number, because the mean of its divisors is an integer number (3312288).

Almost surely, 2^31995725 is an apocalyptic number.

It is an amenable number.

31995725 is a deficient number, since it is larger than the sum of its proper divisors (7751731).

31995725 is a wasteful number, since it uses less digits than its factorization.

31995725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2356 (or 2351 counting only the distinct ones).

The product of its digits is 85050, while the sum is 41.

The square root of 31995725 is about 5656.4763766854. The cubic root of 31995725 is about 317.4660719734.

The spelling of 31995725 in words is "thirty-one million, nine hundred ninety-five thousand, seven hundred twenty-five".