255811523 has 16 divisors (see below), whose sum is σ = 289647360. Its totient is φ = 223792800.

The previous prime is 255811519. The next prime is 255811531. The reversal of 255811523 is 325118552.

It is not a de Polignac number, because 255811523 - 2² = 255811519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255811523.

It is not an unprimeable number, because it can be changed into a prime (255811123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109538 + ... + 111848.

It is an arithmetic number, because the mean of its divisors is an integer number (18102960).

Almost surely, 2^255811523 is an apocalyptic number.

255811523 is a deficient number, since it is larger than the sum of its proper divisors (33835837).

255811523 is a wasteful number, since it uses less digits than its factorization.

255811523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698.

The product of its digits is 12000, while the sum is 32.

The square root of 255811523 is about 15994.1090092571. The cubic root of 255811523 is about 634.8045551400.

The spelling of 255811523 in words is "two hundred fifty-five million, eight hundred eleven thousand, five hundred twenty-three".