256122265 has 12 divisors (see below), whose sum is σ = 357526116. Its totient is φ = 175626528.

The previous prime is 256122259. The next prime is 256122271. The reversal of 256122265 is 562221652.

It is a happy number.

256122265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (256122259) and next prime (256122271).

It can be written as a sum of positive squares in 2 ways, for example, as 131308681 + 124813584 = 11459^2 + 11172^2 .

It is not a de Polignac number, because 256122265 - 2³ = 256122257 is a prime.

It is a super-2 number, since 2×256122265² = 131197229257460450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 522454 + ... + 522943.

It is an arithmetic number, because the mean of its divisors is an integer number (29793843).

Almost surely, 2^256122265 is an apocalyptic number.

It is an amenable number.

256122265 is a deficient number, since it is larger than the sum of its proper divisors (101403851).

256122265 is a wasteful number, since it uses less digits than its factorization.

256122265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045416 (or 1045409 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 256122265 is about 16003.8203251599. The cubic root of 256122265 is about 635.0614899018.

The spelling of 256122265 in words is "two hundred fifty-six million, one hundred twenty-two thousand, two hundred sixty-five".