812256722 has 4 divisors (see below), whose sum is σ = 1218385086. Its totient is φ = 406128360.

The previous prime is 812256703. The next prime is 812256733. The reversal of 812256722 is 227652218.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 227652218 = 2 ⋅113826109.

It can be written as a sum of positive squares in only one way, i.e., 766680721 + 45576001 = 27689^2 + 6751^2 .

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 as a sum of consecutive naturals, namely, 203064179 + ... + 203064182.

Almost surely, 2^812256722 is an apocalyptic number.

812256722 is a deficient number, since it is larger than the sum of its proper divisors (406128364).

812256722 is a wasteful number, since it uses less digits than its factorization.

812256722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406128363.

The product of its digits is 26880, while the sum is 35.

The square root of 812256722 is about 28500.1179295806. The cubic root of 812256722 is about 933.0346478205.

The spelling of 812256722 in words is "eight hundred twelve million, two hundred fifty-six thousand, seven hundred twenty-two".