255520553 has 4 divisors (see below), whose sum is σ = 255616848. Its totient is φ = 255424260.

The previous prime is 255520511. The next prime is 255520567. The reversal of 255520553 is 355025552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255520553 - 2⁸ = 255520297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255520583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44051 + ... + 49512.

It is an arithmetic number, because the mean of its divisors is an integer number (63904212).

Almost surely, 2^255520553 is an apocalyptic number.

It is an amenable number.

255520553 is a deficient number, since it is larger than the sum of its proper divisors (96295).

255520553 is an equidigital number, since it uses as much as digits as its factorization.

255520553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96294.

The product of its (nonzero) digits is 37500, while the sum is 32.

The square root of 255520553 is about 15985.0102596151. The cubic root of 255520553 is about 634.5637800108.

The spelling of 255520553 in words is "two hundred fifty-five million, five hundred twenty thousand, five hundred fifty-three".