255565120 has 28 divisors (see below), whose sum is σ = 608565204. Its totient is φ = 102225920.

The previous prime is 255565111. The next prime is 255565133. The reversal of 255565120 is 21565552.

It can be written as a sum of positive squares in 2 ways, for example, as 152176896 + 103388224 = 12336^2 + 10168^2 .

It is a super-2 number, since 2×255565120² = 130627061121228800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399001 + ... + 399640.

Almost surely, 2^255565120 is an apocalyptic number.

255565120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255565120 is an abundant number, since it is smaller than the sum of its proper divisors (353000084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255565120 is an equidigital number, since it uses as much as digits as its factorization.

255565120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798658 (or 798648 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 255565120 is about 15986.4042235895. The cubic root of 255565120 is about 634.6006706635.

The spelling of 255565120 in words is "two hundred fifty-five million, five hundred sixty-five thousand, one hundred twenty".