255923551 has 4 divisors (see below), whose sum is σ = 275609992. Its totient is φ = 236237112.

The previous prime is 255923543. The next prime is 255923567. The reversal of 255923551 is 155329552.

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 255923551 - 2³ = 255923543 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 255923551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255923501) 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, 9843201 + ... + 9843226.

It is an arithmetic number, because the mean of its divisors is an integer number (68902498).

Almost surely, 2^255923551 is an apocalyptic number.

255923551 is a deficient number, since it is larger than the sum of its proper divisors (19686441).

255923551 is a wasteful number, since it uses less digits than its factorization.

255923551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19686440.

The product of its digits is 67500, while the sum is 37.

The square root of 255923551 is about 15997.6107903649. The cubic root of 255923551 is about 634.8972086492.

The spelling of 255923551 in words is "two hundred fifty-five million, nine hundred twenty-three thousand, five hundred fifty-one".