256951099 has 12 divisors (see below), whose sum is σ = 263363400. Its totient is φ = 250655328.

The previous prime is 256951069. The next prime is 256951103. The reversal of 256951099 is 990159652.

It is a de Polignac number, because none of the positive numbers 2^k-256951099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256951069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1435392 + ... + 1435570.

It is an arithmetic number, because the mean of its divisors is an integer number (21946950).

Almost surely, 2^256951099 is an apocalyptic number.

256951099 is a deficient number, since it is larger than the sum of its proper divisors (6412301).

256951099 is an equidigital number, since it uses as much as digits as its factorization.

256951099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 46.

The square root of 256951099 is about 16029.6942890375. The cubic root of 256951099 is about 635.7457904130.

It can be divided in two parts, 2569510 and 99, that added together give a square (2569609 = 1603²).

The spelling of 256951099 in words is "two hundred fifty-six million, nine hundred fifty-one thousand, ninety-nine".