255566001 has 4 divisors (see below), whose sum is σ = 340754672. Its totient is φ = 170377332.

The previous prime is 255565963. The next prime is 255566021. The reversal of 255566001 is 100665552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 255566001 - 2⁷ = 255565873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255566001.

It is not an unprimeable number, because it can be changed into a prime (255566021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42594331 + ... + 42594336.

It is an arithmetic number, because the mean of its divisors is an integer number (85188668).

Almost surely, 2^255566001 is an apocalyptic number.

It is an amenable number.

255566001 is a deficient number, since it is larger than the sum of its proper divisors (85188671).

255566001 is an equidigital number, since it uses as much as digits as its factorization.

255566001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85188670.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 255566001 is about 15986.4317782299. The cubic root of 255566001 is about 634.6013998744.

The spelling of 255566001 in words is "two hundred fifty-five million, five hundred sixty-six thousand, one".