31345725 has 24 divisors (see below), whose sum is σ = 54555040. Its totient is φ = 15837120.

The previous prime is 31345703. The next prime is 31345789. The reversal of 31345725 is 52754313.

It is not a de Polignac number, because 31345725 - 2¹¹ = 31343677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31345692 and 31345701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9574 + ... + 12423.

Almost surely, 2^31345725 is an apocalyptic number.

It is an amenable number.

31345725 is a deficient number, since it is larger than the sum of its proper divisors (23209315).

31345725 is a wasteful number, since it uses less digits than its factorization.

31345725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22029 (or 22024 counting only the distinct ones).

The product of its digits is 12600, while the sum is 30.

The square root of 31345725 is about 5598.7253013521. The cubic root of 31345725 is about 315.3015504869.

The spelling of 31345725 in words is "thirty-one million, three hundred forty-five thousand, seven hundred twenty-five".