256256319 has 8 divisors (see below), whose sum is σ = 372736512. Its totient is φ = 155306840.

The previous prime is 256256311. The next prime is 256256327. The reversal of 256256319 is 913652652.

It is an interprime number because it is at equal distance from previous prime (256256311) and next prime (256256327).

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 256256319 - 2³ = 256256311 is a prime.

It is a super-2 number, since 2×256256319² = 131334602054859522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256256311) 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, 3882639 + ... + 3882704.

It is an arithmetic number, because the mean of its divisors is an integer number (46592064).

Almost surely, 2^256256319 is an apocalyptic number.

256256319 is a deficient number, since it is larger than the sum of its proper divisors (116480193).

256256319 is a wasteful number, since it uses less digits than its factorization.

256256319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7765357.

The product of its digits is 97200, while the sum is 39.

The square root of 256256319 is about 16008.0079647656. The cubic root of 256256319 is about 635.1722673132.

The spelling of 256256319 in words is "two hundred fifty-six million, two hundred fifty-six thousand, three hundred nineteen".