31928870271 has 4 divisors (see below), whose sum is σ = 42571827032. Its totient is φ = 21285913512.

The previous prime is 31928870251. The next prime is 31928870279. The reversal of 31928870271 is 17207882913.

It is a happy number.

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

It is not a de Polignac number, because 31928870271 - 2¹³ = 31928862079 is a prime.

It is a super-2 number, since 2×31928870271² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31928870271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31928870279) 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, 5321478376 + ... + 5321478381.

It is an arithmetic number, because the mean of its divisors is an integer number (10642956758).

Almost surely, 2^31928870271 is an apocalyptic number.

31928870271 is a deficient number, since it is larger than the sum of its proper divisors (10642956761).

31928870271 is a wasteful number, since it uses less digits than its factorization.

31928870271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10642956760.

The product of its (nonzero) digits is 338688, while the sum is 48.

The spelling of 31928870271 in words is "thirty-one billion, nine hundred twenty-eight million, eight hundred seventy thousand, two hundred seventy-one".