522021108 has 72 divisors (see below), whose sum is σ = 1500291072. Its totient is φ = 140372736.

The previous prime is 522021047. The next prime is 522021109. The reversal of 522021108 is 801120225.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522021109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16116 + ... + 36107.

It is an arithmetic number, because the mean of its divisors is an integer number (20837376).

Almost surely, 2^522021108 is an apocalyptic number.

It is an amenable number.

522021108 is an abundant number, since it is smaller than the sum of its proper divisors (978269964).

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

522021108 is a wasteful number, since it uses less digits than its factorization.

522021108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52261 (or 52252 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 522021108 is about 22847.7812489528. The cubic root of 522021108 is about 805.1856408660.

The spelling of 522021108 in words is "five hundred twenty-two million, twenty-one thousand, one hundred eight".