256237223 has 6 divisors (see below), whose sum is σ = 281649312. Its totient is φ = 232942820.

The previous prime is 256237147. The next prime is 256237229. The reversal of 256237223 is 322732652.

It is not a de Polignac number, because 256237223 - 2¹⁸ = 255975079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256237223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256237229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1058711 + ... + 1058952.

It is an arithmetic number, because the mean of its divisors is an integer number (46941552).

Almost surely, 2^256237223 is an apocalyptic number.

256237223 is a deficient number, since it is larger than the sum of its proper divisors (25412089).

256237223 is a wasteful number, since it uses less digits than its factorization.

256237223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117685 (or 2117674 counting only the distinct ones).

The product of its digits is 30240, while the sum is 32.

The square root of 256237223 is about 16007.4115021761. The cubic root of 256237223 is about 635.1564894246.

Adding to 256237223 its reverse (322732652), we get a palindrome (578969875).

The spelling of 256237223 in words is "two hundred fifty-six million, two hundred thirty-seven thousand, two hundred twenty-three".