255111553 has 4 divisors (see below), whose sum is σ = 261333828. Its totient is φ = 248889280.

The previous prime is 255111523. The next prime is 255111569. The reversal of 255111553 is 355111552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15233409 + 239878144 = 3903^2 + 15488^2 .

It is a cyclic number.

It is not a de Polignac number, because 255111553 - 2²¹ = 253014401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255111523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3111076 + ... + 3111157.

It is an arithmetic number, because the mean of its divisors is an integer number (65333457).

Almost surely, 2^255111553 is an apocalyptic number.

It is an amenable number.

255111553 is a deficient number, since it is larger than the sum of its proper divisors (6222275).

255111553 is an equidigital number, since it uses as much as digits as its factorization.

255111553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6222274.

The product of its digits is 3750, while the sum is 28.

The square root of 255111553 is about 15972.2119006730. The cubic root of 255111553 is about 634.2250268494.

Subtracting 255111553 from its reverse (355111552), we obtain a palindrome (99999999).

The spelling of 255111553 in words is "two hundred fifty-five million, one hundred eleven thousand, five hundred fifty-three".