31718574039 has 4 divisors (see below), whose sum is σ = 42291432056. Its totient is φ = 21145716024.

The previous prime is 31718574031. The next prime is 31718574059. The reversal of 31718574039 is 93047581713.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31718574039 - 2³ = 31718574031 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 (31718574031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5286429004 + ... + 5286429009.

It is an arithmetic number, because the mean of its divisors is an integer number (10572858014).

Almost surely, 2^31718574039 is an apocalyptic number.

31718574039 is a deficient number, since it is larger than the sum of its proper divisors (10572858017).

31718574039 is a wasteful number, since it uses less digits than its factorization.

31718574039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10572858016.

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 31718574039 in words is "thirty-one billion, seven hundred eighteen million, five hundred seventy-four thousand, thirty-nine".