31945972375 has 8 divisors (see below), whose sum is σ = 39868573680. Its totient is φ = 25556777800.

The previous prime is 31945972369. The next prime is 31945972417. The reversal of 31945972375 is 57327954913.

It is not a de Polignac number, because 31945972375 - 2¹⁵ = 31945939607 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127783765 + ... + 127784014.

It is an arithmetic number, because the mean of its divisors is an integer number (4983571710).

Almost surely, 2^31945972375 is an apocalyptic number.

31945972375 is a deficient number, since it is larger than the sum of its proper divisors (7922601305).

31945972375 is an equidigital number, since it uses as much as digits as its factorization.

31945972375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255567794 (or 255567784 counting only the distinct ones).

The product of its digits is 7144200, while the sum is 55.

The spelling of 31945972375 in words is "thirty-one billion, nine hundred forty-five million, nine hundred seventy-two thousand, three hundred seventy-five".