319391157 has 16 divisors (see below), whose sum is σ = 435290112. Its totient is φ = 208257840.

The previous prime is 319391113. The next prime is 319391161. The reversal of 319391157 is 751193913.

It is not a de Polignac number, because 319391157 - 2⁸ = 319390901 is a prime.

It is a super-2 number, since 2×319391157² = 204021422339597298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (319391557) 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 15 ways as a sum of consecutive naturals, for example, 21148 + ... + 32954.

It is an arithmetic number, because the mean of its divisors is an integer number (27205632).

Almost surely, 2^319391157 is an apocalyptic number.

It is an amenable number.

319391157 is a deficient number, since it is larger than the sum of its proper divisors (115898955).

319391157 is a wasteful number, since it uses less digits than its factorization.

319391157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12008.

The product of its digits is 25515, while the sum is 39.

The square root of 319391157 is about 17871.5180384879. The cubic root of 319391157 is about 683.5563087265.

The spelling of 319391157 in words is "three hundred nineteen million, three hundred ninety-one thousand, one hundred fifty-seven".