256168922 has 4 divisors (see below), whose sum is σ = 384253386. Its totient is φ = 128084460.

The previous prime is 256168909. The next prime is 256168987. The reversal of 256168922 is 229861652.

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

It can be written as a sum of positive squares in only one way, i.e., 197936761 + 58232161 = 14069^2 + 7631^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 256168922.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64042229 + ... + 64042232.

Almost surely, 2^256168922 is an apocalyptic number.

256168922 is a deficient number, since it is larger than the sum of its proper divisors (128084464).

256168922 is a wasteful number, since it uses less digits than its factorization.

256168922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128084463.

The product of its digits is 103680, while the sum is 41.

The square root of 256168922 is about 16005.2779419790. The cubic root of 256168922 is about 635.1000499555.

The spelling of 256168922 in words is "two hundred fifty-six million, one hundred sixty-eight thousand, nine hundred twenty-two".