256512553 has 8 divisors (see below), whose sum is σ = 280208736. Its totient is φ = 232879200.

The previous prime is 256512533. The next prime is 256512593. The reversal of 256512553 is 355215652.

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

It is a cyclic number.

It is not a de Polignac number, because 256512553 - 2¹⁷ = 256381481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256512533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6951 + ... + 23692.

It is an arithmetic number, because the mean of its divisors is an integer number (35026092).

Almost surely, 2^256512553 is an apocalyptic number.

It is an amenable number.

256512553 is a deficient number, since it is larger than the sum of its proper divisors (23696183).

256512553 is a wasteful number, since it uses less digits than its factorization.

256512553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31415.

The product of its digits is 45000, while the sum is 34.

The square root of 256512553 is about 16016.0092719753. The cubic root of 256512553 is about 635.3839024386.

The spelling of 256512553 in words is "two hundred fifty-six million, five hundred twelve thousand, five hundred fifty-three".