256612523 has 4 divisors (see below), whose sum is σ = 257539200. Its totient is φ = 255685848.

The previous prime is 256612507. The next prime is 256612529. The reversal of 256612523 is 325216652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256612523 - 2⁴ = 256612507 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256612523.

It is not an unprimeable number, because it can be changed into a prime (256612529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462923 + ... + 463476.

It is an arithmetic number, because the mean of its divisors is an integer number (64384800).

Almost surely, 2^256612523 is an apocalyptic number.

256612523 is a deficient number, since it is larger than the sum of its proper divisors (926677).

256612523 is an equidigital number, since it uses as much as digits as its factorization.

256612523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926676.

The product of its digits is 21600, while the sum is 32.

The square root of 256612523 is about 16019.1299077072. The cubic root of 256612523 is about 635.4664339146.

The spelling of 256612523 in words is "two hundred fifty-six million, six hundred twelve thousand, five hundred twenty-three".