255633869 has 6 divisors (see below), whose sum is σ = 264537930. Its totient is φ = 246735776.

The previous prime is 255633841. The next prime is 255633881. The reversal of 255633869 is 968336552.

It can be written as a sum of positive squares in 3 ways, for example, as 22705225 + 232928644 = 4765^2 + 15262^2 .

It is not a de Polignac number, because 255633869 - 2²⁰ = 254585293 is a prime.

It is a super-2 number, since 2×255633869² = 130697349959818322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255636869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84617 + ... + 87585.

It is an arithmetic number, because the mean of its divisors is an integer number (44089655).

Almost surely, 2^255633869 is an apocalyptic number.

255633869 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

255633869 is a deficient number, since it is larger than the sum of its proper divisors (8904061).

255633869 is an frugal number, since it uses more digits than its factorization.

255633869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5967 (or 2998 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 47.

The square root of 255633869 is about 15988.5543123823. The cubic root of 255633869 is about 634.6575697297.

The spelling of 255633869 in words is "two hundred fifty-five million, six hundred thirty-three thousand, eight hundred sixty-nine".