522331866 has 72 divisors (see below), whose sum is σ = 1336289760. Its totient is φ = 146993616.

The previous prime is 522331861. The next prime is 522331883. The reversal of 522331866 is 668133225.

It is a happy number.

It is a super-3 number, since 3×522331866³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 522331866.

It is not an unprimeable number, because it can be changed into a prime (522331861) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 54675 + ... + 63513.

It is an arithmetic number, because the mean of its divisors is an integer number (18559580).

Almost surely, 2^522331866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 522331866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (668144880).

522331866 is an abundant number, since it is smaller than the sum of its proper divisors (813957894).

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

522331866 is a wasteful number, since it uses less digits than its factorization.

522331866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8928 (or 8918 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 522331866 is about 22854.5808537370. The cubic root of 522331866 is about 805.3453842433.

The spelling of 522331866 in words is "five hundred twenty-two million, three hundred thirty-one thousand, eight hundred sixty-six".