255991106 has 16 divisors (see below), whose sum is σ = 442300416. Its totient is φ = 108845856.

The previous prime is 255991069. The next prime is 255991111. The reversal of 255991106 is 601199552.

It is a super-2 number, since 2×255991106² = 131062892702206472, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 255991106.

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, 70211 + ... + 73766.

It is an arithmetic number, because the mean of its divisors is an integer number (27643776).

Almost surely, 2^255991106 is an apocalyptic number.

255991106 is a deficient number, since it is larger than the sum of its proper divisors (186309310).

255991106 is a wasteful number, since it uses less digits than its factorization.

255991106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144113.

The product of its (nonzero) digits is 24300, while the sum is 38.

The square root of 255991106 is about 15999.7220600859. The cubic root of 255991106 is about 634.9530673975.

The spelling of 255991106 in words is "two hundred fifty-five million, nine hundred ninety-one thousand, one hundred six".