256224311 has 4 divisors (see below), whose sum is σ = 292827792. Its totient is φ = 219620832.

The previous prime is 256224299. The next prime is 256224317. The reversal of 256224311 is 113422652.

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 256224311 - 2⁶ = 256224247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256224317) 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, 18301730 + ... + 18301743.

It is an arithmetic number, because the mean of its divisors is an integer number (73206948).

Almost surely, 2^256224311 is an apocalyptic number.

256224311 is a deficient number, since it is larger than the sum of its proper divisors (36603481).

256224311 is an equidigital number, since it uses as much as digits as its factorization.

256224311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36603480.

The product of its digits is 2880, while the sum is 26.

The square root of 256224311 is about 16007.0081839174. The cubic root of 256224311 is about 635.1458205631.

Adding to 256224311 its reverse (113422652), we get a palindrome (369646963).

The spelling of 256224311 in words is "two hundred fifty-six million, two hundred twenty-four thousand, three hundred eleven".