813271855 has 24 divisors (see below), whose sum is σ = 1074580416. Its totient is φ = 590441280.

The previous prime is 813271847. The next prime is 813271919. The reversal of 813271855 is 558172318.

It is not a de Polignac number, because 813271855 - 2³ = 813271847 is a prime.

It is a super-2 number, since 2×813271855² = 1322822220270282050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 612202 + ... + 613528.

It is an arithmetic number, because the mean of its divisors is an integer number (44774184).

Almost surely, 2^813271855 is an apocalyptic number.

813271855 is a deficient number, since it is larger than the sum of its proper divisors (261308561).

813271855 is a wasteful number, since it uses less digits than its factorization.

813271855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2367 (or 2356 counting only the distinct ones).

The product of its digits is 67200, while the sum is 40.

The square root of 813271855 is about 28517.9216458703. The cubic root of 813271855 is about 933.4231784967.

The spelling of 813271855 in words is "eight hundred thirteen million, two hundred seventy-one thousand, eight hundred fifty-five".