256315427 has 16 divisors (see below), whose sum is σ = 277966080. Its totient is φ = 235620000.

The previous prime is 256315399. The next prime is 256315439. The reversal of 256315427 is 724513652.

It is a cyclic number.

It is not a de Polignac number, because 256315427 - 2⁶ = 256315363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256315447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166652 + ... + 168182.

It is an arithmetic number, because the mean of its divisors is an integer number (17372880).

Almost surely, 2^256315427 is an apocalyptic number.

256315427 is a deficient number, since it is larger than the sum of its proper divisors (21650653).

256315427 is a wasteful number, since it uses less digits than its factorization.

256315427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834.

The product of its digits is 50400, while the sum is 35.

The square root of 256315427 is about 16009.8540592974. The cubic root of 256315427 is about 635.2210997690.

The spelling of 256315427 in words is "two hundred fifty-six million, three hundred fifteen thousand, four hundred twenty-seven".