256155 has 8 divisors (see below), whose sum is σ = 409872. Its totient is φ = 136608.

The previous prime is 256147. The next prime is 256163. The reversal of 256155 is 551652.

It is an interprime number because it is at equal distance from previous prime (256147) and next prime (256163).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256155 - 2³ = 256147 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256155.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8524 + ... + 8553.

It is an arithmetic number, because the mean of its divisors is an integer number (51234).

2²⁵⁶¹⁵⁵ is an apocalyptic number.

256155 is a deficient number, since it is larger than the sum of its proper divisors (153717).

256155 is a wasteful number, since it uses less digits than its factorization.

256155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17085.

The product of its digits is 1500, while the sum is 24.

The square root of 256155 is about 506.1175752728. The cubic root of 256155 is about 63.5088544497.

The spelling of 256155 in words is "two hundred fifty-six thousand, one hundred fifty-five".