256020223 has 4 divisors (see below), whose sum is σ = 259104888. Its totient is φ = 252935560.

The previous prime is 256020209. The next prime is 256020229. The reversal of 256020223 is 322020652.

It is a happy number.

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-256020223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256020194 and 256020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256020229) 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, 1542208 + ... + 1542373.

It is an arithmetic number, because the mean of its divisors is an integer number (64776222).

Almost surely, 2^256020223 is an apocalyptic number.

256020223 is a deficient number, since it is larger than the sum of its proper divisors (3084665).

256020223 is an equidigital number, since it uses as much as digits as its factorization.

256020223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084664.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 256020223 is about 16000.6319562697. The cubic root of 256020223 is about 634.9771401447.

Adding to 256020223 its reverse (322020652), we get a palindrome (578040875).

The spelling of 256020223 in words is "two hundred fifty-six million, twenty thousand, two hundred twenty-three".