255170897 has 4 divisors (see below), whose sum is σ = 256493220. Its totient is φ = 253848576.

The previous prime is 255170891. The next prime is 255170899. The reversal of 255170897 is 798071552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 177449041 + 77721856 = 13321^2 + 8816^2 .

It is a cyclic number.

It is not a de Polignac number, because 255170897 - 2²⁶ = 188062033 is a prime.

It is a super-2 number, since 2×255170897² = 130224373351569218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255170891) 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, 660872 + ... + 661257.

It is an arithmetic number, because the mean of its divisors is an integer number (64123305).

Almost surely, 2^255170897 is an apocalyptic number.

It is an amenable number.

255170897 is a deficient number, since it is larger than the sum of its proper divisors (1322323).

255170897 is a wasteful number, since it uses less digits than its factorization.

255170897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322322.

The product of its (nonzero) digits is 176400, while the sum is 44.

The square root of 255170897 is about 15974.0695190675. The cubic root of 255170897 is about 634.2742008043.

The spelling of 255170897 in words is "two hundred fifty-five million, one hundred seventy thousand, eight hundred ninety-seven".