256645022 has 8 divisors (see below), whose sum is σ = 407612736. Its totient is φ = 120774112.

The previous prime is 256645021. The next prime is 256645033. The reversal of 256645022 is 220546652.

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

It is a self number, because there is not a number n which added to its sum of digits gives 256645022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256645021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3774158 + ... + 3774225.

It is an arithmetic number, because the mean of its divisors is an integer number (50951592).

Almost surely, 2^256645022 is an apocalyptic number.

256645022 is a deficient number, since it is larger than the sum of its proper divisors (150967714).

256645022 is a wasteful number, since it uses less digits than its factorization.

256645022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7548402.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 256645022 is about 16020.1442565290. The cubic root of 256645022 is about 635.4932592511.

The spelling of 256645022 in words is "two hundred fifty-six million, six hundred forty-five thousand, twenty-two".