513255631169 has 2 divisors, whose sum is σ = 513255631170. Its totient is φ = 513255631168.

The previous prime is 513255631061. The next prime is 513255631183. The reversal of 513255631169 is 961136552315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279696072769 + 233559558400 = 528863^2 + 483280^2 .

It is a cyclic number.

It is not a de Polignac number, because 513255631169 - 2²⁸ = 512987195713 is a prime.

It is a super-2 number, since 2×513255631169² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (513255633169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256627815584 + 256627815585.

It is an arithmetic number, because the mean of its divisors is an integer number (256627815585).

Almost surely, 2^513255631169 is an apocalyptic number.

It is an amenable number.

513255631169 is a deficient number, since it is larger than the sum of its proper divisors (1).

513255631169 is an equidigital number, since it uses as much as digits as its factorization.

513255631169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 729000, while the sum is 47.

The spelling of 513255631169 in words is "five hundred thirteen billion, two hundred fifty-five million, six hundred thirty-one thousand, one hundred sixty-nine".