255553913 has 2 divisors, whose sum is σ = 255553914. Its totient is φ = 255553912.

The previous prime is 255553901. The next prime is 255553927. The reversal of 255553913 is 319355552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131721529 + 123832384 = 11477^2 + 11128^2 .

It is a cyclic number.

It is not a de Polignac number, because 255553913 - 2⁶ = 255553849 is a prime.

It is a super-2 number, since 2×255553913² = 130615604899223138, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (255550913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127776956 + 127776957.

It is an arithmetic number, because the mean of its divisors is an integer number (127776957).

Almost surely, 2^255553913 is an apocalyptic number.

It is an amenable number.

255553913 is a deficient number, since it is larger than the sum of its proper divisors (1).

255553913 is an equidigital number, since it uses as much as digits as its factorization.

255553913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 101250, while the sum is 38.

The square root of 255553913 is about 15986.0537031501. The cubic root of 255553913 is about 634.5913943929.

It can be divided in two parts, 2555539 and 13, that added together give a palindrome (2555552).

The spelling of 255553913 in words is "two hundred fifty-five million, five hundred fifty-three thousand, nine hundred thirteen".