513216532457 has 2 divisors, whose sum is σ = 513216532458. Its totient is φ = 513216532456.

The previous prime is 513216532421. The next prime is 513216532627. The reversal of 513216532457 is 754235612315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 471947016256 + 41269516201 = 686984^2 + 203149^2 .

It is a cyclic number.

It is not a de Polignac number, because 513216532457 - 2⁶ = 513216532393 is a prime.

It is not a weakly prime, because it can be changed into another prime (513216232457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256608266228 + 256608266229.

It is an arithmetic number, because the mean of its divisors is an integer number (256608266229).

Almost surely, 2^513216532457 is an apocalyptic number.

It is an amenable number.

513216532457 is a deficient number, since it is larger than the sum of its proper divisors (1).

513216532457 is an equidigital number, since it uses as much as digits as its factorization.

513216532457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756000, while the sum is 44.

The spelling of 513216532457 in words is "five hundred thirteen billion, two hundred sixteen million, five hundred thirty-two thousand, four hundred fifty-seven".