255647089 has 8 divisors (see below), whose sum is σ = 258888168. Its totient is φ = 252418560.

The previous prime is 255647057. The next prime is 255647099. The reversal of 255647089 is 980746552.

It can be written as a sum of positive squares in 4 ways, for example, as 24850225 + 230796864 = 4985^2 + 15192^2 .

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 255647089 - 2⁵ = 255647057 is a prime.

It is a super-2 number, since 2×255647089² = 130710868228347842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255647099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41859 + ... + 47575.

It is an arithmetic number, because the mean of its divisors is an integer number (32361021).

Almost surely, 2^255647089 is an apocalyptic number.

It is an amenable number.

255647089 is a deficient number, since it is larger than the sum of its proper divisors (3241079).

255647089 is an equidigital number, since it uses as much as digits as its factorization.

255647089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6275.

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 255647089 is about 15988.9677277803. The cubic root of 255647089 is about 634.6685098925.

The spelling of 255647089 in words is "two hundred fifty-five million, six hundred forty-seven thousand, eighty-nine".