256022651 has 8 divisors (see below), whose sum is σ = 259246800. Its totient is φ = 252806400.

The previous prime is 256022639. The next prime is 256022693. The reversal of 256022651 is 156220652.

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

It is a cyclic number.

It is not a de Polignac number, because 256022651 - 2²⁶ = 188913787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256021651) 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, 88376 + ... + 91226.

It is an arithmetic number, because the mean of its divisors is an integer number (32405850).

Almost surely, 2^256022651 is an apocalyptic number.

256022651 is a deficient number, since it is larger than the sum of its proper divisors (3224149).

256022651 is a wasteful number, since it uses less digits than its factorization.

256022651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3949.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 256022651 is about 16000.7078280931. The cubic root of 256022651 is about 634.9791474335.

The spelling of 256022651 in words is "two hundred fifty-six million, twenty-two thousand, six hundred fifty-one".