256247275 has 24 divisors (see below), whose sum is σ = 326032704. Its totient is φ = 199718400.

The previous prime is 256247269. The next prime is 256247297. The reversal of 256247275 is 572742652.

It is not a de Polignac number, because 256247275 - 2¹³ = 256239083 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 171582 + ... + 173068.

It is an arithmetic number, because the mean of its divisors is an integer number (13584696).

Almost surely, 2^256247275 is an apocalyptic number.

256247275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256247275 is a deficient number, since it is larger than the sum of its proper divisors (69785429).

256247275 is a wasteful number, since it uses less digits than its factorization.

256247275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671 (or 1666 counting only the distinct ones).

The product of its digits is 235200, while the sum is 40.

The square root of 256247275 is about 16007.7254786556. The cubic root of 256247275 is about 635.1647948918.

The spelling of 256247275 in words is "two hundred fifty-six million, two hundred forty-seven thousand, two hundred seventy-five".