256881201 has 4 divisors (see below), whose sum is σ = 342508272. Its totient is φ = 171254132.

The previous prime is 256881167. The next prime is 256881211. The reversal of 256881201 is 102188652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256881201 - 2¹¹ = 256879153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256881211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42813531 + ... + 42813536.

It is an arithmetic number, because the mean of its divisors is an integer number (85627068).

Almost surely, 2^256881201 is an apocalyptic number.

It is an amenable number.

256881201 is a deficient number, since it is larger than the sum of its proper divisors (85627071).

256881201 is an equidigital number, since it uses as much as digits as its factorization.

256881201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85627070.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 256881201 is about 16027.5138745845. The cubic root of 256881201 is about 635.6881382119.

The spelling of 256881201 in words is "two hundred fifty-six million, eight hundred eighty-one thousand, two hundred one".