521436402940324 has 27 divisors (see below), whose sum is σ = 913321555977537. Its totient is φ = 260487590986944.

The previous prime is 521436402940309. The next prime is 521436402940399. The reversal of 521436402940324 is 423049204634125.

The square root of 521436402940324 is 22834982.

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

It can be written as a sum of positive squares in only one way, i.e., 519829512052900 + 1606890887424 = 22799770^2 + 1267632^2 .

It is a super-2 number, since 2×521436402940324² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 59233938907 + ... + 59233947709.

Almost surely, 2^{521436402940324} is an apocalyptic number.

521436402940324 is the 22834982-nd square number.

It is an amenable number.

521436402940324 is a deficient number, since it is larger than the sum of its proper divisors (391885153037213).

521436402940324 is an frugal number, since it uses more digits than its factorization.

521436402940324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20204 (or 10102 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 49.

The spelling of 521436402940324 in words is "five hundred twenty-one trillion, four hundred thirty-six billion, four hundred two million, nine hundred forty thousand, three hundred twenty-four".