31913043871 has 8 divisors (see below), whose sum is σ = 32212334000. Its totient is φ = 31613872320.

The previous prime is 31913043847. The next prime is 31913043901. The reversal of 31913043871 is 17834031913.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31913043871 - 2¹⁵ = 31913011103 is a prime.

It is a super-2 number, since 2×31913043871² (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 (31913044871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567076 + ... + 620806.

It is an arithmetic number, because the mean of its divisors is an integer number (4026541750).

Almost surely, 2^31913043871 is an apocalyptic number.

31913043871 is a deficient number, since it is larger than the sum of its proper divisors (299290129).

31913043871 is a wasteful number, since it uses less digits than its factorization.

31913043871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59289.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 31913043871 in words is "thirty-one billion, nine hundred thirteen million, forty-three thousand, eight hundred seventy-one".