255561830 has 16 divisors (see below), whose sum is σ = 474850944. Its totient is φ = 98927040.

The previous prime is 255561811. The next prime is 255561841. The reversal of 255561830 is 38165552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411887 + ... + 412506.

It is an arithmetic number, because the mean of its divisors is an integer number (29678184).

Almost surely, 2^255561830 is an apocalyptic number.

255561830 is a deficient number, since it is larger than the sum of its proper divisors (219289114).

255561830 is a wasteful number, since it uses less digits than its factorization.

255561830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824431.

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 255561830 is about 15986.3013233205. The cubic root of 255561830 is about 634.5979474892.

The spelling of 255561830 in words is "two hundred fifty-five million, five hundred sixty-one thousand, eight hundred thirty".