31713507 has 12 divisors (see below), whose sum is σ = 52352560. Its totient is φ = 18121968.

The previous prime is 31713491. The next prime is 31713533. The reversal of 31713507 is 70531713.

It is not a de Polignac number, because 31713507 - 2⁴ = 31713491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31713547) 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, 251632 + ... + 251757.

Almost surely, 2^31713507 is an apocalyptic number.

31713507 is a deficient number, since it is larger than the sum of its proper divisors (20639053).

31713507 is a wasteful number, since it uses less digits than its factorization.

31713507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503402 (or 503399 counting only the distinct ones).

The product of its (nonzero) digits is 2205, while the sum is 27.

The square root of 31713507 is about 5631.4746736534. The cubic root of 31713507 is about 316.5299118949.

It can be divided in two parts, 317 and 13507, that added together give a cube (13824 = 24³).

The spelling of 31713507 in words is "thirty-one million, seven hundred thirteen thousand, five hundred seven".