256022189 has 8 divisors (see below), whose sum is σ = 258225408. Its totient is φ = 253827280.

The previous prime is 256022183. The next prime is 256022213. The reversal of 256022189 is 981220652.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 256022189 - 2¹⁶ = 255956653 is a prime.

It is a super-2 number, since 2×256022189² = 131094722520703442, 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 (256022183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70199 + ... + 73755.

It is an arithmetic number, because the mean of its divisors is an integer number (32278176).

Almost surely, 2^256022189 is an apocalyptic number.

It is an amenable number.

256022189 is a deficient number, since it is larger than the sum of its proper divisors (2203219).

256022189 is a wasteful number, since it uses less digits than its factorization.

256022189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4155.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 256022189 is about 16000.6933912253. The cubic root of 256022189 is about 634.9787654875.

The spelling of 256022189 in words is "two hundred fifty-six million, twenty-two thousand, one hundred eighty-nine".