255511988 has 6 divisors (see below), whose sum is σ = 447145986. Its totient is φ = 127755992.

The previous prime is 255511967. The next prime is 255511999. The reversal of 255511988 is 889115552.

It can be written as a sum of positive squares in only one way, i.e., 247055524 + 8456464 = 15718^2 + 2908^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 31938995 + ... + 31939002.

It is an arithmetic number, because the mean of its divisors is an integer number (74524331).

Almost surely, 2^255511988 is an apocalyptic number.

It is an amenable number.

255511988 is a deficient number, since it is larger than the sum of its proper divisors (191633998).

255511988 is a wasteful number, since it uses less digits than its factorization.

255511988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63878001 (or 63877999 counting only the distinct ones).

The product of its digits is 144000, while the sum is 44.

The square root of 255511988 is about 15984.7423501288. The cubic root of 255511988 is about 634.5566897795.

The spelling of 255511988 in words is "two hundred fifty-five million, five hundred eleven thousand, nine hundred eighty-eight".