31875625 has 10 divisors (see below), whose sum is σ = 39832562. Its totient is φ = 25500000.

The previous prime is 31875601. The next prime is 31875637. The reversal of 31875625 is 52657813.

It can be written as a sum of positive squares in 5 ways, for example, as 7639696 + 24235929 = 2764^2 + 4923^2 .

It is not a de Polignac number, because 31875625 - 2⁵ = 31875593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 24876 + ... + 26125.

Almost surely, 2^31875625 is an apocalyptic number.

It is an amenable number.

31875625 is a deficient number, since it is larger than the sum of its proper divisors (7956937).

31875625 is an frugal number, since it uses more digits than its factorization.

31875625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51021 (or 51006 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 31875625 is about 5645.8502459771. The cubic root of 31875625 is about 317.0683575844.

The spelling of 31875625 in words is "thirty-one million, eight hundred seventy-five thousand, six hundred twenty-five".