522801216 has 140 divisors (see below), whose sum is σ = 1771261888. Its totient is φ = 149361408.

The previous prime is 522801193. The next prime is 522801239. The reversal of 522801216 is 612108225.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (522801193) and next prime (522801239).

It is a super-2 number, since 2×522801216² = 546642222902157312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 522801216.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29085 + ... + 43491.

Almost surely, 2^522801216 is an apocalyptic number.

522801216 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 522801216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (885630944).

522801216 is an abundant number, since it is smaller than the sum of its proper divisors (1248460672).

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

522801216 is a wasteful number, since it uses less digits than its factorization.

522801216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14438 (or 14419 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 522801216 is about 22864.8467302976. The cubic root of 522801216 is about 805.5865308662.

The spelling of 522801216 in words is "five hundred twenty-two million, eight hundred one thousand, two hundred sixteen".