256322266 has 4 divisors (see below), whose sum is σ = 384483402. Its totient is φ = 128161132.

The previous prime is 256322239. The next prime is 256322267. The reversal of 256322266 is 662223652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 133888041 + 122434225 = 11571^2 + 11065^2 .

It is a super-2 number, since 2×256322266² = 131402208094749512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256322267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64080565 + ... + 64080568.

Almost surely, 2^256322266 is an apocalyptic number.

256322266 is a deficient number, since it is larger than the sum of its proper divisors (128161136).

256322266 is a wasteful number, since it uses less digits than its factorization.

256322266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128161135.

The product of its digits is 51840, while the sum is 34.

The square root of 256322266 is about 16010.0676450788. The cubic root of 256322266 is about 635.2267493684.

The spelling of 256322266 in words is "two hundred fifty-six million, three hundred twenty-two thousand, two hundred sixty-six".