256224722 has 16 divisors (see below), whose sum is σ = 414818712. Its totient is φ = 117995520.

The previous prime is 256224713. The next prime is 256224733. The reversal of 256224722 is 227422652.

It can be written as a sum of positive squares in 4 ways, for example, as 88755241 + 167469481 = 9421^2 + 12941^2 .

It is a super-2 number, since 2×256224722² = 131302216327954568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1298 + ... + 22674.

Almost surely, 2^256224722 is an apocalyptic number.

256224722 is a deficient number, since it is larger than the sum of its proper divisors (158593990).

256224722 is a wasteful number, since it uses less digits than its factorization.

256224722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21853.

The product of its digits is 26880, while the sum is 32.

The square root of 256224722 is about 16007.0210220390. The cubic root of 256224722 is about 635.1461601676.

The spelling of 256224722 in words is "two hundred fifty-six million, two hundred twenty-four thousand, seven hundred twenty-two".