813311157 has 16 divisors (see below), whose sum is σ = 1092777920. Its totient is φ = 538036992.

The previous prime is 813311143. The next prime is 813311167. The reversal of 813311157 is 751113318.

It is not a de Polignac number, because 813311157 - 2⁷ = 813311029 is a prime.

It is a super-2 number, since 2×813311157² = 1322950076201357298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813311117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545469 + ... + 546957.

It is an arithmetic number, because the mean of its divisors is an integer number (68298620).

Almost surely, 2^813311157 is an apocalyptic number.

It is an amenable number.

813311157 is a deficient number, since it is larger than the sum of its proper divisors (279466763).

813311157 is a wasteful number, since it uses less digits than its factorization.

813311157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772.

The product of its digits is 2520, while the sum is 30.

The square root of 813311157 is about 28518.6107130063. The cubic root of 813311157 is about 933.4382143901.

The spelling of 813311157 in words is "eight hundred thirteen million, three hundred eleven thousand, one hundred fifty-seven".