255127561 has 8 divisors (see below), whose sum is σ = 274877064. Its totient is φ = 235395840.

The previous prime is 255127553. The next prime is 255127567. The reversal of 255127561 is 165721552.

It can be written as a sum of positive squares in 4 ways, for example, as 9610000 + 245517561 = 3100^2 + 15669^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255127561 - 2³ = 255127553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255127567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51681 + ... + 56401.

It is an arithmetic number, because the mean of its divisors is an integer number (34359633).

Almost surely, 2^255127561 is an apocalyptic number.

It is an amenable number.

255127561 is a deficient number, since it is larger than the sum of its proper divisors (19749503).

255127561 is a wasteful number, since it uses less digits than its factorization.

255127561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8891.

The product of its digits is 21000, while the sum is 34.

The square root of 255127561 is about 15972.7130131359. The cubic root of 255127561 is about 634.2382922383.

The spelling of 255127561 in words is "two hundred fifty-five million, one hundred twenty-seven thousand, five hundred sixty-one".