255561256 has 8 divisors (see below), whose sum is σ = 479177370. Its totient is φ = 127780624.

The previous prime is 255561239. The next prime is 255561263. The reversal of 255561256 is 652165552.

It can be written as a sum of positive squares in only one way, i.e., 212868100 + 42693156 = 14590^2 + 6534^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15972571 + ... + 15972586.

Almost surely, 2^255561256 is an apocalyptic number.

It is an amenable number.

255561256 is a deficient number, since it is larger than the sum of its proper divisors (223616114).

255561256 is a wasteful number, since it uses less digits than its factorization.

255561256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31945163 (or 31945159 counting only the distinct ones).

The product of its digits is 90000, while the sum is 37.

The square root of 255561256 is about 15986.2833704398. The cubic root of 255561256 is about 634.5974723797.

The spelling of 255561256 in words is "two hundred fifty-five million, five hundred sixty-one thousand, two hundred fifty-six".