256613023 has 4 divisors (see below), whose sum is σ = 259153848. Its totient is φ = 254072200.

The previous prime is 256613003. The next prime is 256613039. The reversal of 256613023 is 320316652.

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 256613023 - 2⁵ = 256612991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256612982 and 256613000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256613003) 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, 1270261 + ... + 1270462.

It is an arithmetic number, because the mean of its divisors is an integer number (64788462).

Almost surely, 2^256613023 is an apocalyptic number.

256613023 is a deficient number, since it is larger than the sum of its proper divisors (2540825).

256613023 is a wasteful number, since it uses less digits than its factorization.

256613023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540824.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 256613023 is about 16019.1455140404. The cubic root of 256613023 is about 635.4668466419.

Adding to 256613023 its reverse (320316652), we get a palindrome (576929675).

The spelling of 256613023 in words is "two hundred fifty-six million, six hundred thirteen thousand, twenty-three".