256151 has 16 divisors (see below), whose sum is σ = 321024. Its totient is φ = 199584.

The previous prime is 256147. The next prime is 256163. The reversal of 256151 is 151652.

It is not a de Polignac number, because 256151 - 2² = 256147 is a prime.

It is a super-2 number, since 2×256151² = 131226669602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256151.

It is not an unprimeable number, because it can be changed into a prime (256121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5936 + ... + 5978.

It is an arithmetic number, because the mean of its divisors is an integer number (20064).

2²⁵⁶¹⁵¹ is an apocalyptic number.

256151 is a deficient number, since it is larger than the sum of its proper divisors (64873).

256151 is a wasteful number, since it uses less digits than its factorization.

256151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110.

The product of its digits is 300, while the sum is 20.

The square root of 256151 is about 506.1136236064. The cubic root of 256151 is about 63.5085238728.

The spelling of 256151 in words is "two hundred fifty-six thousand, one hundred fifty-one".