256888157 has 4 divisors (see below), whose sum is σ = 257358336. Its totient is φ = 256417980.

The previous prime is 256888133. The next prime is 256888187. The reversal of 256888157 is 751888652.

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 256888157 - 2²² = 252693853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256888187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234269 + ... + 235362.

It is an arithmetic number, because the mean of its divisors is an integer number (64339584).

Almost surely, 2^256888157 is an apocalyptic number.

It is an amenable number.

256888157 is a deficient number, since it is larger than the sum of its proper divisors (470179).

256888157 is an equidigital number, since it uses as much as digits as its factorization.

256888157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470178.

The product of its digits is 1075200, while the sum is 50.

The square root of 256888157 is about 16027.7308749554. The cubic root of 256888157 is about 635.6938760222.

The spelling of 256888157 in words is "two hundred fifty-six million, eight hundred eighty-eight thousand, one hundred fifty-seven".