81568227 has 24 divisors (see below), whose sum is σ = 124435696. Its totient is φ = 47236608.

The previous prime is 81568217. The next prime is 81568231. The reversal of 81568227 is 72286518.

It is not a de Polignac number, because 81568227 - 2¹⁶ = 81502691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81568217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7653 + ... + 14889.

Almost surely, 2^81568227 is an apocalyptic number.

81568227 is a deficient number, since it is larger than the sum of its proper divisors (42867469).

81568227 is a wasteful number, since it uses less digits than its factorization.

81568227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7287 (or 7270 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 81568227 is about 9031.5129961707. The cubic root of 81568227 is about 433.6842738293.

The spelling of 81568227 in words is "eighty-one million, five hundred sixty-eight thousand, two hundred twenty-seven".