31713425 has 6 divisors (see below), whose sum is σ = 39324678. Its totient is φ = 25370720.

The previous prime is 31713401. The next prime is 31713433. The reversal of 31713425 is 52431713.

It can be written as a sum of positive squares in 3 ways, for example, as 1430416 + 30283009 = 1196^2 + 5503^2 .

It is not a de Polignac number, because 31713425 - 2⁸ = 31713169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31713394 and 31713403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 634244 + ... + 634293.

It is an arithmetic number, because the mean of its divisors is an integer number (6554113).

Almost surely, 2^31713425 is an apocalyptic number.

It is an amenable number.

31713425 is a deficient number, since it is larger than the sum of its proper divisors (7611253).

31713425 is a wasteful number, since it uses less digits than its factorization.

31713425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268547 (or 1268542 counting only the distinct ones).

The product of its digits is 2520, while the sum is 26.

The square root of 31713425 is about 5631.4673931401. The cubic root of 31713425 is about 316.5296390829.

The spelling of 31713425 in words is "thirty-one million, seven hundred thirteen thousand, four hundred twenty-five".