256097057 has 16 divisors (see below), whose sum is σ = 268894080. Its totient is φ = 243600000.

The previous prime is 256097053. The next prime is 256097077. The reversal of 256097057 is 750790652.

It is not a de Polignac number, because 256097057 - 2² = 256097053 is a prime.

It is a super-2 number, since 2×256097057² = 131171405208122498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256097053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1020182 + ... + 1020432.

It is an arithmetic number, because the mean of its divisors is an integer number (16805880).

Almost surely, 2^256097057 is an apocalyptic number.

It is an amenable number.

256097057 is a deficient number, since it is larger than the sum of its proper divisors (12797023).

256097057 is a wasteful number, since it uses less digits than its factorization.

256097057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its (nonzero) digits is 132300, while the sum is 41.

The square root of 256097057 is about 16003.0327438270. The cubic root of 256097057 is about 635.0406545984.

The spelling of 256097057 in words is "two hundred fifty-six million, ninety-seven thousand, fifty-seven".