256347211 has 16 divisors (see below), whose sum is σ = 279044640. Its totient is φ = 234904320.

The previous prime is 256347187. The next prime is 256347229. The reversal of 256347211 is 112743652.

It is a cyclic number.

It is not a de Polignac number, because 256347211 - 2⁷ = 256347083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256347911) 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, 41080 + ... + 46906.

It is an arithmetic number, because the mean of its divisors is an integer number (17440290).

Almost surely, 2^256347211 is an apocalyptic number.

256347211 is a deficient number, since it is larger than the sum of its proper divisors (22697429).

256347211 is a wasteful number, since it uses less digits than its factorization.

256347211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5934.

The product of its digits is 10080, while the sum is 31.

The square root of 256347211 is about 16010.8466671816. The cubic root of 256347211 is about 635.2473552220.

The spelling of 256347211 in words is "two hundred fifty-six million, three hundred forty-seven thousand, two hundred eleven".