255711623 has 4 divisors (see below), whose sum is σ = 256056528. Its totient is φ = 255366720.

The previous prime is 255711613. The next prime is 255711649. The reversal of 255711623 is 326117552.

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

It is a cyclic number.

It is not a de Polignac number, because 255711623 - 2¹² = 255707527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255711623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255711613) 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, 171338 + ... + 172823.

It is an arithmetic number, because the mean of its divisors is an integer number (64014132).

Almost surely, 2^255711623 is an apocalyptic number.

255711623 is a deficient number, since it is larger than the sum of its proper divisors (344905).

255711623 is an equidigital number, since it uses as much as digits as its factorization.

255711623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344904.

The product of its digits is 12600, while the sum is 32.

The square root of 255711623 is about 15990.9856794383. The cubic root of 255711623 is about 634.7219093554.

The spelling of 255711623 in words is "two hundred fifty-five million, seven hundred eleven thousand, six hundred twenty-three".