256055155 has 4 divisors (see below), whose sum is σ = 307266192. Its totient is φ = 204844120.

The previous prime is 256055141. The next prime is 256055167. The reversal of 256055155 is 551550652.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 256055155 - 2¹¹ = 256053107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256055155.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25605511 + ... + 25605520.

It is an arithmetic number, because the mean of its divisors is an integer number (76816548).

Almost surely, 2^256055155 is an apocalyptic number.

256055155 is a deficient number, since it is larger than the sum of its proper divisors (51211037).

256055155 is an equidigital number, since it uses as much as digits as its factorization.

256055155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51211036.

The product of its (nonzero) digits is 37500, while the sum is 34.

The square root of 256055155 is about 16001.7235009233. The cubic root of 256055155 is about 635.0060180883.

The spelling of 256055155 in words is "two hundred fifty-six million, fifty-five thousand, one hundred fifty-five".