513255553 has 2 divisors, whose sum is σ = 513255554. Its totient is φ = 513255552.

The previous prime is 513255487. The next prime is 513255559. The reversal of 513255553 is 355552315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 422014849 + 91240704 = 20543^2 + 9552^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513255553 is a prime.

It is not a weakly prime, because it can be changed into another prime (513255559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256627776 + 256627777.

It is an arithmetic number, because the mean of its divisors is an integer number (256627777).

Almost surely, 2^513255553 is an apocalyptic number.

It is an amenable number.

513255553 is a deficient number, since it is larger than the sum of its proper divisors (1).

513255553 is an equidigital number, since it uses as much as digits as its factorization.

513255553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56250, while the sum is 34.

The square root of 513255553 is about 22655.1440736977. The cubic root of 513255553 is about 800.6534000444.

The spelling of 513255553 in words is "five hundred thirteen million, two hundred fifty-five thousand, five hundred fifty-three".