522455741721 has 27 divisors (see below), whose sum is σ = 757743512149. Its totient is φ = 346885672632.

The previous prime is 522455741653. The next prime is 522455741771. The reversal of 522455741721 is 127147554225.

It is a happy number.

The square root of 522455741721 is 722811.

It is a perfect power (a square), and thus also a powerful number.

522455741721 is a `hidden beast` number, since 5 + 2 + 2 + 4 + 5 + 574 + 1 + 72 + 1 = 666.

It is not a de Polignac number, because 522455741721 - 2¹⁵ = 522455708953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (522455741771) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1038679156 + ... + 1038679658.

Almost surely, 2^522455741721 is an apocalyptic number.

522455741721 is the 722811-st square number.

522455741721 is the 361406-th centered octagonal number.

It is an amenable number.

522455741721 is a deficient number, since it is larger than the sum of its proper divisors (235287770428).

522455741721 is an frugal number, since it uses more digits than its factorization.

522455741721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970 (or 985 counting only the distinct ones).

The product of its digits is 784000, while the sum is 45.

The spelling of 522455741721 in words is "five hundred twenty-two billion, four hundred fifty-five million, seven hundred forty-one thousand, seven hundred twenty-one".