256270571 has 4 divisors (see below), whose sum is σ = 260614200. Its totient is φ = 251926944.

The previous prime is 256270561. The next prime is 256270579. The reversal of 256270571 is 175072652.

It is a happy number.

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 256270571 - 2⁶ = 256270507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256270579) 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, 2171726 + ... + 2171843.

It is an arithmetic number, because the mean of its divisors is an integer number (65153550).

Almost surely, 2^256270571 is an apocalyptic number.

256270571 is a deficient number, since it is larger than the sum of its proper divisors (4343629).

256270571 is an equidigital number, since it uses as much as digits as its factorization.

256270571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4343628.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 256270571 is about 16008.4531107787. The cubic root of 256270571 is about 635.1840423819.

The spelling of 256270571 in words is "two hundred fifty-six million, two hundred seventy thousand, five hundred seventy-one".