256022869 has 4 divisors (see below), whose sum is σ = 262942444. Its totient is φ = 249103296.

The previous prime is 256022813. The next prime is 256022887. The reversal of 256022869 is 968220652.

256022869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 192182769 + 63840100 = 13863^2 + 7990^2 .

It is a cyclic number.

It is not a de Polignac number, because 256022869 - 2¹³ = 256014677 is a prime.

It is a super-2 number, since 2×256022869² = 131095418901982322, 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 (256022069) 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, 3459732 + ... + 3459805.

It is an arithmetic number, because the mean of its divisors is an integer number (65735611).

Almost surely, 2^256022869 is an apocalyptic number.

It is an amenable number.

256022869 is a deficient number, since it is larger than the sum of its proper divisors (6919575).

256022869 is an equidigital number, since it uses as much as digits as its factorization.

256022869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6919574.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 256022869 is about 16000.7146402903. The cubic root of 256022869 is about 634.9793276590.

The spelling of 256022869 in words is "two hundred fifty-six million, twenty-two thousand, eight hundred sixty-nine".