255557513 has 2 divisors, whose sum is σ = 255557514. Its totient is φ = 255557512.

The previous prime is 255557507. The next prime is 255557563. The reversal of 255557513 is 315755552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249545209 + 6012304 = 15797^2 + 2452^2 .

It is a cyclic number.

It is not a de Polignac number, because 255557513 - 2⁸ = 255557257 is a prime.

It is not a weakly prime, because it can be changed into another prime (255557563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127778756 + 127778757.

It is an arithmetic number, because the mean of its divisors is an integer number (127778757).

Almost surely, 2^255557513 is an apocalyptic number.

It is an amenable number.

255557513 is a deficient number, since it is larger than the sum of its proper divisors (1).

255557513 is an equidigital number, since it uses as much as digits as its factorization.

255557513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131250, while the sum is 38.

The square root of 255557513 is about 15986.1663008990. The cubic root of 255557513 is about 634.5943742185.

The spelling of 255557513 in words is "two hundred fifty-five million, five hundred fifty-seven thousand, five hundred thirteen".