256226767 has 4 divisors (see below), whose sum is σ = 256602600. Its totient is φ = 255850936.

The previous prime is 256226741. The next prime is 256226791. The reversal of 256226767 is 767622652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256226767 is a prime.

It is a super-2 number, since 2×256226767² = 131304312254544578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256226167) 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, 186892 + ... + 188257.

It is an arithmetic number, because the mean of its divisors is an integer number (64150650).

Almost surely, 2^256226767 is an apocalyptic number.

256226767 is a deficient number, since it is larger than the sum of its proper divisors (375833).

256226767 is an equidigital number, since it uses as much as digits as its factorization.

256226767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375832.

The product of its digits is 423360, while the sum is 43.

The square root of 256226767 is about 16007.0849001309. The cubic root of 256226767 is about 635.1478499219.

The spelling of 256226767 in words is "two hundred fifty-six million, two hundred twenty-six thousand, seven hundred sixty-seven".