31715427039 has 4 divisors (see below), whose sum is σ = 42287236056. Its totient is φ = 21143618024.

The previous prime is 31715426989. The next prime is 31715427047. The reversal of 31715427039 is 93072451713.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93072451713 = 3 ⋅31024150571.

It is a cyclic number.

It is not a de Polignac number, because 31715427039 - 2⁸ = 31715426783 is a prime.

It is a super-2 number, since 2×31715427039² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31715427739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5285904504 + ... + 5285904509.

It is an arithmetic number, because the mean of its divisors is an integer number (10571809014).

Almost surely, 2^31715427039 is an apocalyptic number.

31715427039 is a deficient number, since it is larger than the sum of its proper divisors (10571809017).

31715427039 is a wasteful number, since it uses less digits than its factorization.

31715427039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10571809016.

The product of its (nonzero) digits is 158760, while the sum is 42.

The spelling of 31715427039 in words is "thirty-one billion, seven hundred fifteen million, four hundred twenty-seven thousand, thirty-nine".