256432003 has 2 divisors, whose sum is σ = 256432004. Its totient is φ = 256432002.

The previous prime is 256431947. The next prime is 256432019. The reversal of 256432003 is 300234652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256432003 is a prime.

It is not a weakly prime, because it can be changed into another prime (256472003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128216001 + 128216002.

It is an arithmetic number, because the mean of its divisors is an integer number (128216002).

Almost surely, 2^256432003 is an apocalyptic number.

256432003 is a deficient number, since it is larger than the sum of its proper divisors (1).

256432003 is an equidigital number, since it uses as much as digits as its factorization.

256432003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 256432003 is about 16013.4944031589. The cubic root of 256432003 is about 635.3173877842.

Adding to 256432003 its reverse (300234652), we get a palindrome (556666655).

The spelling of 256432003 in words is "two hundred fifty-six million, four hundred thirty-two thousand, three".