256251722 has 8 divisors (see below), whose sum is σ = 393752772. Its totient is φ = 125000800.

The previous prime is 256251719. The next prime is 256251731. The reversal of 256251722 is 227152652.

256251722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 163302841 + 92948881 = 12779^2 + 9641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1562429 + ... + 1562592.

Almost surely, 2^256251722 is an apocalyptic number.

256251722 is a deficient number, since it is larger than the sum of its proper divisors (137501050).

256251722 is a wasteful number, since it uses less digits than its factorization.

256251722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125064.

The product of its digits is 16800, while the sum is 32.

The square root of 256251722 is about 16007.8643797354. The cubic root of 256251722 is about 635.1684691572.

The spelling of 256251722 in words is "two hundred fifty-six million, two hundred fifty-one thousand, seven hundred twenty-two".