255531655 has 16 divisors (see below), whose sum is σ = 313489440. Its totient is φ = 199894912.

The previous prime is 255531649. The next prime is 255531691. The reversal of 255531655 is 556135552.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255531655 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55917 + ... + 60313.

It is an arithmetic number, because the mean of its divisors is an integer number (19593090).

Almost surely, 2^255531655 is an apocalyptic number.

255531655 is a deficient number, since it is larger than the sum of its proper divisors (57957785).

255531655 is a wasteful number, since it uses less digits than its factorization.

255531655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4658.

The product of its digits is 112500, while the sum is 37.

The square root of 255531655 is about 15985.3575186794. The cubic root of 255531655 is about 634.5729701718.

The spelling of 255531655 in words is "two hundred fifty-five million, five hundred thirty-one thousand, six hundred fifty-five".