256622123 has 8 divisors (see below), whose sum is σ = 280483200. Its totient is φ = 233735040.

The previous prime is 256622117. The next prime is 256622129. The reversal of 256622123 is 321226652.

It is an interprime number because it is at equal distance from previous prime (256622117) and next prime (256622129).

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

It is not a de Polignac number, because 256622123 - 2⁸ = 256621867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256622129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242948 + ... + 244001.

It is an arithmetic number, because the mean of its divisors is an integer number (35060400).

Almost surely, 2^256622123 is an apocalyptic number.

256622123 is a deficient number, since it is larger than the sum of its proper divisors (23861077).

256622123 is a wasteful number, since it uses less digits than its factorization.

256622123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486997.

The product of its digits is 8640, while the sum is 29.

The square root of 256622123 is about 16019.4295466474. The cubic root of 256622123 is about 635.4743581858.

Adding to 256622123 its reverse (321226652), we get a palindrome (577848775).

The spelling of 256622123 in words is "two hundred fifty-six million, six hundred twenty-two thousand, one hundred twenty-three".