521230310055513 has 12 divisors (see below), whose sum is σ = 752900746801060. Its totient is φ = 347481094370976.

The previous prime is 521230310055509. The next prime is 521230310055529. The reversal of 521230310055513 is 315550013032125.

521230310055513 is a `hidden beast` number, since 5 + 2 + 1 + 2 + 30 + 3 + 100 + 5 + 5 + 513 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 361103253382089 + 160127056673424 = 19002717^2 + 12654132^2 .

It is not a de Polignac number, because 521230310055513 - 2² = 521230310055509 is a prime.

It is a super-2 number, since 2×521230310055513² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521230310055913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 481012018 + ... + 482094411.

Almost surely, 2^{521230310055513} is an apocalyptic number.

It is an amenable number.

521230310055513 is a deficient number, since it is larger than the sum of its proper divisors (231670436745547).

521230310055513 is a wasteful number, since it uses less digits than its factorization.

521230310055513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963166568 (or 963166565 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

Adding to 521230310055513 its reverse (315550013032125), we get a palindrome (836780323087638).

The spelling of 521230310055513 in words is "five hundred twenty-one trillion, two hundred thirty billion, three hundred ten million, fifty-five thousand, five hundred thirteen".