31866025 has 9 divisors (see below), whose sum is σ = 39548901. Its totient is φ = 25470240.

The previous prime is 31866013. The next prime is 31866049. The reversal of 31866025 is 52066813.

The square root of 31866025 is 5645.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 11108889 + 20757136 = 3333^2 + 4556^2 .

It is not a de Polignac number, because 31866025 - 2⁹ = 31865513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27661 + ... + 28789.

Almost surely, 2^31866025 is an apocalyptic number.

31866025 is the 5645-th square number.

31866025 is the 2823-rd centered octagonal number.

It is an amenable number.

31866025 is a deficient number, since it is larger than the sum of its proper divisors (7682876).

31866025 is an frugal number, since it uses more digits than its factorization.

31866025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268 (or 1134 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The cubic root of 31866025 is about 317.0365238362.

The spelling of 31866025 in words is "thirty-one million, eight hundred sixty-six thousand, twenty-five".