522420131221156 has 72 divisors (see below), whose sum is σ = 1074276692858880. Its totient is φ = 221628441892032.

The previous prime is 522420131221151. The next prime is 522420131221169. The reversal of 522420131221156 is 651122131024225.

It is not an unprimeable number, because it can be changed into a prime (522420131221151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17084970 + ... + 36561406.

It is an arithmetic number, because the mean of its divisors is an integer number (14920509623040).

Almost surely, 2^{522420131221156} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 522420131221156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (537138346429440).

522420131221156 is an abundant number, since it is smaller than the sum of its proper divisors (551856561637724).

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

522420131221156 is a wasteful number, since it uses less digits than its factorization.

522420131221156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19477841 (or 19477832 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 522420131221156 in words is "five hundred twenty-two trillion, four hundred twenty billion, one hundred thirty-one million, two hundred twenty-one thousand, one hundred fifty-six".