256233403 has 4 divisors (see below), whose sum is σ = 259112520. Its totient is φ = 253354288.

The previous prime is 256233371. The next prime is 256233407. The reversal of 256233403 is 304332652.

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 256233403 - 2⁵ = 256233371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256233407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1439425 + ... + 1439602.

It is an arithmetic number, because the mean of its divisors is an integer number (64778130).

Almost surely, 2^256233403 is an apocalyptic number.

256233403 is a deficient number, since it is larger than the sum of its proper divisors (2879117).

256233403 is an equidigital number, since it uses as much as digits as its factorization.

256233403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2879116.

The product of its (nonzero) digits is 12960, while the sum is 28.

The square root of 256233403 is about 16007.2921820026. The cubic root of 256233403 is about 635.1533330918.

The spelling of 256233403 in words is "two hundred fifty-six million, two hundred thirty-three thousand, four hundred three".