813256227 has 32 divisors (see below), whose sum is σ = 1382261760. Its totient is φ = 462922560.

The previous prime is 813256163. The next prime is 813256243. The reversal of 813256227 is 722652318.

813256227 is a `hidden beast` number, since 8 + 1 + 3 + 25 + 622 + 7 = 666.

It is not a de Polignac number, because 813256227 - 2⁶ = 813256163 is a prime.

It is a super-2 number, since 2×813256227² = 1322771381508551058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 813256191 and 813256200.

It is not an unprimeable number, because it can be changed into a prime (813256267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41527 + ... + 57887.

It is an arithmetic number, because the mean of its divisors is an integer number (43195680).

Almost surely, 2^813256227 is an apocalyptic number.

813256227 is a deficient number, since it is larger than the sum of its proper divisors (569005533).

813256227 is a wasteful number, since it uses less digits than its factorization.

813256227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16640 (or 16634 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 813256227 is about 28517.6476414167. The cubic root of 813256227 is about 933.4171995075.

The spelling of 813256227 in words is "eight hundred thirteen million, two hundred fifty-six thousand, two hundred twenty-seven".