256503233 has 8 divisors (see below), whose sum is σ = 295256640. Its totient is φ = 218277360.

The previous prime is 256503227. The next prime is 256503253. The reversal of 256503233 is 332305652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256503233 - 2⁴ = 256503217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256503196 and 256503205.

It is not an unprimeable number, because it can be changed into a prime (256503253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130838 + ... + 132783.

It is an arithmetic number, because the mean of its divisors is an integer number (36907080).

Almost surely, 2^256503233 is an apocalyptic number.

It is an amenable number.

256503233 is a deficient number, since it is larger than the sum of its proper divisors (38753407).

256503233 is a wasteful number, since it uses less digits than its factorization.

256503233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263767.

The product of its (nonzero) digits is 16200, while the sum is 29.

The square root of 256503233 is about 16015.7183104599. The cubic root of 256503233 is about 635.3762071041.

Adding to 256503233 its reverse (332305652), we get a palindrome (588808885).

The spelling of 256503233 in words is "two hundred fifty-six million, five hundred three thousand, two hundred thirty-three".