255993903 has 12 divisors (see below), whose sum is σ = 403384488. Its totient is φ = 155147760.

The previous prime is 255993901. The next prime is 255993923. The reversal of 255993903 is 309399552.

255993903 is a `hidden beast` number, since 2 + 559 + 9 + 3 + 90 + 3 = 666.

It is not a de Polignac number, because 255993903 - 2¹ = 255993901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255993901) 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 11 ways as a sum of consecutive naturals, for example, 1292800 + ... + 1292997.

It is an arithmetic number, because the mean of its divisors is an integer number (33615374).

Almost surely, 2^255993903 is an apocalyptic number.

255993903 is a deficient number, since it is larger than the sum of its proper divisors (147390585).

255993903 is a wasteful number, since it uses less digits than its factorization.

255993903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585814 (or 2585811 counting only the distinct ones).

The product of its (nonzero) digits is 328050, while the sum is 45.

The square root of 255993903 is about 15999.8094676155. The cubic root of 255993903 is about 634.9553799221.

The spelling of 255993903 in words is "two hundred fifty-five million, nine hundred ninety-three thousand, nine hundred three".