256432223 has 4 divisors (see below), whose sum is σ = 256481568. Its totient is φ = 256382880.

The previous prime is 256432219. The next prime is 256432259. The reversal of 256432223 is 322234652.

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

It is a cyclic number.

It is not a de Polignac number, because 256432223 - 2² = 256432219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256432723) 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, 15818 + ... + 27623.

It is an arithmetic number, because the mean of its divisors is an integer number (64120392).

Almost surely, 2^256432223 is an apocalyptic number.

256432223 is a deficient number, since it is larger than the sum of its proper divisors (49345).

256432223 is an equidigital number, since it uses as much as digits as its factorization.

256432223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49344.

The product of its digits is 17280, while the sum is 29.

The square root of 256432223 is about 16013.5012723639. The cubic root of 256432223 is about 635.3175694695.

Adding to 256432223 its reverse (322234652), we get a palindrome (578666875).

The spelling of 256432223 in words is "two hundred fifty-six million, four hundred thirty-two thousand, two hundred twenty-three".