31313876357 has 4 divisors (see below), whose sum is σ = 31314236640. Its totient is φ = 31313516076.

The previous prime is 31313876329. The next prime is 31313876381. The reversal of 31313876357 is 75367831313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31313876357 - 2²⁶ = 31246767493 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 (31313876387) 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, 39494 + ... + 253352.

It is an arithmetic number, because the mean of its divisors is an integer number (7828559160).

Almost surely, 2^31313876357 is an apocalyptic number.

It is an amenable number.

31313876357 is a deficient number, since it is larger than the sum of its proper divisors (360283).

31313876357 is a wasteful number, since it uses less digits than its factorization.

31313876357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360282.

The product of its digits is 952560, while the sum is 47.

The spelling of 31313876357 in words is "thirty-one billion, three hundred thirteen million, eight hundred seventy-six thousand, three hundred fifty-seven".