812311227 has 32 divisors (see below), whose sum is σ = 1481141760. Its totient is φ = 428470560.

The previous prime is 812311189. The next prime is 812311261. The reversal of 812311227 is 722113218.

It is not a de Polignac number, because 812311227 - 2¹⁵ = 812278459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 812311227.

It is not an unprimeable number, because it can be changed into a prime (812311267) 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, 162849 + ... + 167762.

It is an arithmetic number, because the mean of its divisors is an integer number (46285680).

Almost surely, 2^812311227 is an apocalyptic number.

812311227 is a deficient number, since it is larger than the sum of its proper divisors (668830533).

812311227 is a wasteful number, since it uses less digits than its factorization.

812311227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330640 (or 330634 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 812311227 is about 28501.0741376531. The cubic root of 812311227 is about 933.0555172142.

The spelling of 812311227 in words is "eight hundred twelve million, three hundred eleven thousand, two hundred twenty-seven".