522468618 has 24 divisors (see below), whose sum is σ = 1194552672. Its totient is φ = 149234424.

The previous prime is 522468589. The next prime is 522468629. The reversal of 522468618 is 816864225.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 522468618.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146371 + ... + 149897.

It is an arithmetic number, because the mean of its divisors is an integer number (49773028).

Almost surely, 2^522468618 is an apocalyptic number.

522468618 is an abundant number, since it is smaller than the sum of its proper divisors (672084054).

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

522468618 is an frugal number, since it uses more digits than its factorization.

522468618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7066 (or 3539 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 522468618 is about 22857.5724432845. The cubic root of 522468618 is about 805.4156607535.

Multiplying 522468618 by its sum of digits (42), we get a square (21943681956 = 148134²).

522468618 divided by its sum of digits (42) gives a square (12439729 = 3527²).

The spelling of 522468618 in words is "five hundred twenty-two million, four hundred sixty-eight thousand, six hundred eighteen".