256612319 has 4 divisors (see below), whose sum is σ = 256648320. Its totient is φ = 256576320.

The previous prime is 256612313. The next prime is 256612351. The reversal of 256612319 is 913216652.

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 256612319 - 2¹² = 256608223 is a prime.

It is a super-2 number, since 2×256612319² = 131699764525115522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256612313) 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, 3314 + ... + 22895.

It is an arithmetic number, because the mean of its divisors is an integer number (64162080).

Almost surely, 2^256612319 is an apocalyptic number.

256612319 is a deficient number, since it is larger than the sum of its proper divisors (36001).

256612319 is an equidigital number, since it uses as much as digits as its factorization.

256612319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36000.

The product of its digits is 19440, while the sum is 35.

The square root of 256612319 is about 16019.1235403189. The cubic root of 256612319 is about 635.4662655216.

The spelling of 256612319 in words is "two hundred fifty-six million, six hundred twelve thousand, three hundred nineteen".