865222568 has 16 divisors (see below), whose sum is σ = 1854048480. Its totient is φ = 370809648.

The previous prime is 865222537. The next prime is 865222573.

It is a happy number.

865222568 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×865222568² = 1497220184353029248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7725146 + ... + 7725257.

It is an arithmetic number, because the mean of its divisors is an integer number (115878030).

Almost surely, 2^865222568 is an apocalyptic number.

It is an amenable number.

865222568 is an abundant number, since it is smaller than the sum of its proper divisors (988825912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865222568 is a wasteful number, since it uses less digits than its factorization.

865222568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15450416 (or 15450412 counting only the distinct ones).

The product of its digits is 460800, while the sum is 44.

The square root of 865222568 is about 29414.6658658568. The cubic root of 865222568 is about 952.8896568930.

The spelling of 865222568 in words is "eight hundred sixty-five million, two hundred twenty-two thousand, five hundred sixty-eight".