256124163 has 4 divisors (see below), whose sum is σ = 341498888. Its totient is φ = 170749440.

The previous prime is 256124117. The next prime is 256124173. The reversal of 256124163 is 361421652.

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

It is a de Polignac number, because none of the positive numbers 2^k-256124163 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 256124163.

It is not an unprimeable number, because it can be changed into a prime (256124173) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 42687358 + ... + 42687363.

It is an arithmetic number, because the mean of its divisors is an integer number (85374722).

Almost surely, 2^256124163 is an apocalyptic number.

256124163 is a deficient number, since it is larger than the sum of its proper divisors (85374725).

256124163 is an equidigital number, since it uses as much as digits as its factorization.

256124163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85374724.

The product of its digits is 8640, while the sum is 30.

The square root of 256124163 is about 16003.8796233913. The cubic root of 256124163 is about 635.0630586106.

The spelling of 256124163 in words is "two hundred fifty-six million, one hundred twenty-four thousand, one hundred sixty-three".