256441233 has 16 divisors (see below), whose sum is σ = 360307520. Its totient is φ = 161787456.

The previous prime is 256441231. The next prime is 256441247. The reversal of 256441233 is 332144652.

It is not a de Polignac number, because 256441233 - 2¹ = 256441231 is a prime.

It is a super-3 number, since 3×256441233³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 256441233.

It is not an unprimeable number, because it can be changed into a prime (256441231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68691 + ... + 72327.

It is an arithmetic number, because the mean of its divisors is an integer number (22519220).

Almost surely, 2^256441233 is an apocalyptic number.

It is an amenable number.

256441233 is a deficient number, since it is larger than the sum of its proper divisors (103866287).

256441233 is a wasteful number, since it uses less digits than its factorization.

256441233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896.

The product of its digits is 17280, while the sum is 30.

The square root of 256441233 is about 16013.7825950023. The cubic root of 256441233 is about 635.3250102196.

Adding to 256441233 its reverse (332144652), we get a palindrome (588585885).

The spelling of 256441233 in words is "two hundred fifty-six million, four hundred forty-one thousand, two hundred thirty-three".