513255563 has 2 divisors, whose sum is σ = 513255564. Its totient is φ = 513255562.

The previous prime is 513255559. The next prime is 513255581. The reversal of 513255563 is 365552315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513255563 - 2² = 513255559 is a prime.

It is a Chen prime.

It is equal to p_27016379 and since 513255563 and 27016379 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (513255553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256627781 + 256627782.

It is an arithmetic number, because the mean of its divisors is an integer number (256627782).

Almost surely, 2^513255563 is an apocalyptic number.

513255563 is a deficient number, since it is larger than the sum of its proper divisors (1).

513255563 is an equidigital number, since it uses as much as digits as its factorization.

513255563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67500, while the sum is 35.

The square root of 513255563 is about 22655.1442943981. The cubic root of 513255563 is about 800.6534052442.

The spelling of 513255563 in words is "five hundred thirteen million, two hundred fifty-five thousand, five hundred sixty-three".