256102223 has 4 divisors (see below), whose sum is σ = 275802408. Its totient is φ = 236402040.

The previous prime is 256102211. The next prime is 256102241. The reversal of 256102223 is 322201652.

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 256102223 - 2¹⁴ = 256085839 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 (256102283) 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, 9850073 + ... + 9850098.

It is an arithmetic number, because the mean of its divisors is an integer number (68950602).

Almost surely, 2^256102223 is an apocalyptic number.

256102223 is a deficient number, since it is larger than the sum of its proper divisors (19700185).

256102223 is a wasteful number, since it uses less digits than its factorization.

256102223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19700184.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 256102223 is about 16003.1941499189. The cubic root of 256102223 is about 635.0449245915.

Adding to 256102223 its reverse (322201652), we get a palindrome (578303875).

The spelling of 256102223 in words is "two hundred fifty-six million, one hundred two thousand, two hundred twenty-three".