31790725 has 12 divisors (see below), whose sum is σ = 40165956. Its totient is φ = 24951680.

The previous prime is 31790723. The next prime is 31790729. The reversal of 31790725 is 52709713.

It can be written as a sum of positive squares in 6 ways, for example, as 4761124 + 27029601 = 2182^2 + 5199^2 .

It is not a de Polignac number, because 31790725 - 2¹ = 31790723 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 (31790723) 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, 10672 + ... + 13321.

It is an arithmetic number, because the mean of its divisors is an integer number (3347163).

Almost surely, 2^31790725 is an apocalyptic number.

It is an amenable number.

31790725 is a deficient number, since it is larger than the sum of its proper divisors (8375231).

31790725 is a wasteful number, since it uses less digits than its factorization.

31790725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24056 (or 24051 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 31790725 is about 5638.3264360979. The cubic root of 31790725 is about 316.7866058440.

The spelling of 31790725 in words is "thirty-one million, seven hundred ninety thousand, seven hundred twenty-five".