256223182 has 4 divisors (see below), whose sum is σ = 384334776. Its totient is φ = 128111590.

The previous prime is 256223171. The next prime is 256223213. The reversal of 256223182 is 281322652.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent 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 as a sum of consecutive naturals, namely, 64055794 + ... + 64055797.

It is an arithmetic number, because the mean of its divisors is an integer number (96083694).

Almost surely, 2^256223182 is an apocalyptic number.

256223182 is a deficient number, since it is larger than the sum of its proper divisors (128111594).

256223182 is a wasteful number, since it uses less digits than its factorization.

256223182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128111593.

The product of its digits is 11520, while the sum is 31.

The square root of 256223182 is about 16006.9729180754. The cubic root of 256223182 is about 635.1448876817.

The spelling of 256223182 in words is "two hundred fifty-six million, two hundred twenty-three thousand, one hundred eighty-two".