256676251 has 16 divisors (see below), whose sum is σ = 305411904. Its totient is φ = 213295104.

The previous prime is 256676243. The next prime is 256676257. The reversal of 256676251 is 152676652.

It is a cyclic number.

It is not a de Polignac number, because 256676251 - 2³ = 256676243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256676257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20166 + ... + 30331.

It is an arithmetic number, because the mean of its divisors is an integer number (19088244).

Almost surely, 2^256676251 is an apocalyptic number.

256676251 is a deficient number, since it is larger than the sum of its proper divisors (48735653).

256676251 is a wasteful number, since it uses less digits than its factorization.

256676251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50550.

The product of its digits is 151200, while the sum is 40.

The square root of 256676251 is about 16021.1189059941. The cubic root of 256676251 is about 635.5190341703.

The spelling of 256676251 in words is "two hundred fifty-six million, six hundred seventy-six thousand, two hundred fifty-one".