521100016013 has 2 divisors, whose sum is σ = 521100016014. Its totient is φ = 521100016012.

The previous prime is 521100015979. The next prime is 521100016043. The reversal of 521100016013 is 310610001125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 492385696804 + 28714319209 = 701702^2 + 169453^2 .

It is a cyclic number.

It is not a de Polignac number, because 521100016013 - 2¹⁸ = 521099753869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521100016043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260550008006 + 260550008007.

It is an arithmetic number, because the mean of its divisors is an integer number (260550008007).

Almost surely, 2^521100016013 is an apocalyptic number.

It is an amenable number.

521100016013 is a deficient number, since it is larger than the sum of its proper divisors (1).

521100016013 is an equidigital number, since it uses as much as digits as its factorization.

521100016013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 521100016013 its reverse (310610001125), we get a palindrome (831710017138).

The spelling of 521100016013 in words is "five hundred twenty-one billion, one hundred million, sixteen thousand, thirteen".