522256891 has 4 divisors (see below), whose sum is σ = 562430512. Its totient is φ = 482083272.

The previous prime is 522256873. The next prime is 522256897. The reversal of 522256891 is 198652225.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 522256891 - 2²⁷ = 388039163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (522256897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20086791 + ... + 20086816.

It is an arithmetic number, because the mean of its divisors is an integer number (140607628).

Almost surely, 2^522256891 is an apocalyptic number.

522256891 is a deficient number, since it is larger than the sum of its proper divisors (40173621).

522256891 is a wasteful number, since it uses less digits than its factorization.

522256891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40173620.

The product of its digits is 86400, while the sum is 40.

The square root of 522256891 is about 22852.9405328942. The cubic root of 522256891 is about 805.3068495726.

The spelling of 522256891 in words is "five hundred twenty-two million, two hundred fifty-six thousand, eight hundred ninety-one".