256224155 has 16 divisors (see below), whose sum is σ = 338201568. Its totient is φ = 186340000.

The previous prime is 256224127. The next prime is 256224179. The reversal of 256224155 is 551422652.

It is not a de Polignac number, because 256224155 - 2¹⁰ = 256223131 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12596 + ... + 25905.

It is an arithmetic number, because the mean of its divisors is an integer number (21137598).

Almost surely, 2^256224155 is an apocalyptic number.

256224155 is a deficient number, since it is larger than the sum of its proper divisors (81977413).

256224155 is an equidigital number, since it uses as much as digits as its factorization.

256224155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38539 (or 38517 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

The square root of 256224155 is about 16007.0033110511. The cubic root of 256224155 is about 635.1456916620.

The spelling of 256224155 in words is "two hundred fifty-six million, two hundred twenty-four thousand, one hundred fifty-five".