256222711 has 4 divisors (see below), whose sum is σ = 256270392. Its totient is φ = 256175032.

The previous prime is 256222699. The next prime is 256222717. The reversal of 256222711 is 117222652.

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 256222711 - 2⁵ = 256222679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256222711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256222717) 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, 14581 + ... + 26926.

It is an arithmetic number, because the mean of its divisors is an integer number (64067598).

Almost surely, 2^256222711 is an apocalyptic number.

256222711 is a deficient number, since it is larger than the sum of its proper divisors (47681).

256222711 is an equidigital number, since it uses as much as digits as its factorization.

256222711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47680.

The product of its digits is 3360, while the sum is 28.

The square root of 256222711 is about 16006.9582057304. The cubic root of 256222711 is about 635.1444984983.

The spelling of 256222711 in words is "two hundred fifty-six million, two hundred twenty-two thousand, seven hundred eleven".