810256226 has 16 divisors (see below), whose sum is σ = 1316448504. Its totient is φ = 371800704.

The previous prime is 810256169. The next prime is 810256277. The reversal of 810256226 is 622652018.

It is a Cunningham number, because it is equal to 28465²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 810256225 + 1 = 28465^2 + 1^2 .

It is a junction number, because it is equal to n+sod(n) for n = 810256192 and 810256201.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 85571 + ... + 94566.

Almost surely, 2^810256226 is an apocalyptic number.

810256226 is a deficient number, since it is larger than the sum of its proper divisors (506192278).

810256226 is a wasteful number, since it uses less digits than its factorization.

810256226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180325.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 810256226 is about 28465.0000175654. Note that the first 4 decimals coincide. The cubic root of 810256226 is about 932.2680320111.

The spelling of 810256226 in words is "eight hundred ten million, two hundred fifty-six thousand, two hundred twenty-six".