255123553 has 4 divisors (see below), whose sum is σ = 256031748. Its totient is φ = 254215360.

The previous prime is 255123551. The next prime is 255123571. The reversal of 255123553 is 355321552.

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 170354704 + 84768849 = 13052^2 + 9207^2 .

It is a cyclic number.

It is not a de Polignac number, because 255123553 - 2¹ = 255123551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255123551) 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, 453676 + ... + 454237.

It is an arithmetic number, because the mean of its divisors is an integer number (64007937).

Almost surely, 2^255123553 is an apocalyptic number.

It is an amenable number.

255123553 is a deficient number, since it is larger than the sum of its proper divisors (908195).

255123553 is an equidigital number, since it uses as much as digits as its factorization.

255123553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908194.

The product of its digits is 22500, while the sum is 31.

The square root of 255123553 is about 15972.5875486723. The cubic root of 255123553 is about 634.2349709711.

The spelling of 255123553 in words is "two hundred fifty-five million, one hundred twenty-three thousand, five hundred fifty-three".