255783393 has 64 divisors (see below), whose sum is σ = 410572800. Its totient is φ = 157066560.

The previous prime is 255783361. The next prime is 255783397. The reversal of 255783393 is 393387552.

255783393 is a `hidden beast` number, since 2 + 557 + 8 + 3 + 3 + 93 = 666.

It is not a de Polignac number, because 255783393 - 2⁵ = 255783361 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (255783397) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2390446 + ... + 2390552.

It is an arithmetic number, because the mean of its divisors is an integer number (6415200).

Almost surely, 2^255783393 is an apocalyptic number.

It is an amenable number.

255783393 is a deficient number, since it is larger than the sum of its proper divisors (154789407).

255783393 is a wasteful number, since it uses less digits than its factorization.

255783393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 253 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 255783393 is about 15993.2295988021. The cubic root of 255783393 is about 634.7812857859.

The spelling of 255783393 in words is "two hundred fifty-five million, seven hundred eighty-three thousand, three hundred ninety-three".