256455297 has 24 divisors (see below), whose sum is σ = 429680576. Its totient is φ = 144356256.

The previous prime is 256455289. The next prime is 256455299. The reversal of 256455297 is 792554652.

256455297 is a `hidden beast` number, since 2 + 5 + 6 + 4 + 552 + 97 = 666.

It is not a de Polignac number, because 256455297 - 2³ = 256455289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256455299) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26158 + ... + 34599.

Almost surely, 2^256455297 is an apocalyptic number.

It is an amenable number.

256455297 is a deficient number, since it is larger than the sum of its proper divisors (173225279).

256455297 is a wasteful number, since it uses less digits than its factorization.

256455297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60837 (or 60834 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The square root of 256455297 is about 16014.2217107170. The cubic root of 256455297 is about 635.3366243784.

The spelling of 256455297 in words is "two hundred fifty-six million, four hundred fifty-five thousand, two hundred ninety-seven".