255275781 has 16 divisors (see below), whose sum is σ = 359669760. Its totient is φ = 160720560.

The previous prime is 255275771. The next prime is 255275809. The reversal of 255275781 is 187572552.

It is not a de Polignac number, because 255275781 - 2⁵ = 255275749 is a prime.

It is a super-2 number, since 2×255275781² = 130331448730319922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255275771) 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, 17965 + ... + 28866.

It is an arithmetic number, because the mean of its divisors is an integer number (22479360).

Almost surely, 2^255275781 is an apocalyptic number.

It is an amenable number.

255275781 is a deficient number, since it is larger than the sum of its proper divisors (104393979).

255275781 is a wasteful number, since it uses less digits than its factorization.

255275781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46936.

The product of its digits is 196000, while the sum is 42.

The square root of 255275781 is about 15977.3521273082. The cubic root of 255275781 is about 634.3610917251.

The spelling of 255275781 in words is "two hundred fifty-five million, two hundred seventy-five thousand, seven hundred eighty-one".