319385631 has 4 divisors (see below), whose sum is σ = 425847512. Its totient is φ = 212923752.

The previous prime is 319385629. The next prime is 319385641. The reversal of 319385631 is 136583913.

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

It is not a de Polignac number, because 319385631 - 2¹ = 319385629 is a prime.

It is a super-2 number, since 2×319385631² = 204014362578536322, which 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 319385631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319385641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53230936 + ... + 53230941.

It is an arithmetic number, because the mean of its divisors is an integer number (106461878).

Almost surely, 2^319385631 is an apocalyptic number.

319385631 is a deficient number, since it is larger than the sum of its proper divisors (106461881).

319385631 is a wasteful number, since it uses less digits than its factorization.

319385631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106461880.

The product of its digits is 58320, while the sum is 39.

The square root of 319385631 is about 17871.3634342766. The cubic root of 319385631 is about 683.5523664822.

The spelling of 319385631 in words is "three hundred nineteen million, three hundred eighty-five thousand, six hundred thirty-one".