255520761 has 16 divisors (see below), whose sum is σ = 362190528. Its totient is φ = 159680000.

The previous prime is 255520757. The next prime is 255520801. The reversal of 255520761 is 167025552.

It is a cyclic number.

It is not a de Polignac number, because 255520761 - 2² = 255520757 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255520361) 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, 2821 + ... + 22781.

It is an arithmetic number, because the mean of its divisors is an integer number (22636908).

Almost surely, 2^255520761 is an apocalyptic number.

It is an amenable number.

255520761 is a deficient number, since it is larger than the sum of its proper divisors (106669767).

255520761 is a wasteful number, since it uses less digits than its factorization.

255520761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20232.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 255520761 is about 15985.0167657091. The cubic root of 255520761 is about 634.5639521943.

The spelling of 255520761 in words is "two hundred fifty-five million, five hundred twenty thousand, seven hundred sixty-one".