255977218 has 16 divisors (see below), whose sum is σ = 440003520. Its totient is φ = 109408176.

The previous prime is 255977213. The next prime is 255977221. The reversal of 255977218 is 812779552.

It is a happy number.

It is a super-2 number, since 2×255977218² = 131048672270039048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (255977213) 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, 19288 + ... + 29731.

It is an arithmetic number, because the mean of its divisors is an integer number (27500220).

Almost surely, 2^255977218 is an apocalyptic number.

255977218 is a deficient number, since it is larger than the sum of its proper divisors (184026302).

255977218 is a wasteful number, since it uses less digits than its factorization.

255977218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49401.

The product of its digits is 352800, while the sum is 46.

The square root of 255977218 is about 15999.2880466601. The cubic root of 255977218 is about 634.9415847229.

The spelling of 255977218 in words is "two hundred fifty-five million, nine hundred seventy-seven thousand, two hundred eighteen".