256591053 has 12 divisors (see below), whose sum is σ = 370777888. Its totient is φ = 170993160.

The previous prime is 256591051. The next prime is 256591057. The reversal of 256591053 is 350195652.

256591053 is a `hidden beast` number, since 2 + 565 + 91 + 0 + 5 + 3 = 666.

It is not a de Polignac number, because 256591053 - 2¹ = 256591051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256590999 and 256591017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256591051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30918 + ... + 38328.

Almost surely, 2^256591053 is an apocalyptic number.

It is an amenable number.

256591053 is a deficient number, since it is larger than the sum of its proper divisors (114186835).

256591053 is a wasteful number, since it uses less digits than its factorization.

256591053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11264 (or 11261 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The square root of 256591053 is about 16018.4597574174. The cubic root of 256591053 is about 635.4487108969.

The spelling of 256591053 in words is "two hundred fifty-six million, five hundred ninety-one thousand, fifty-three".