256338503 has 2 divisors, whose sum is σ = 256338504. Its totient is φ = 256338502.

The previous prime is 256338493. The next prime is 256338521. The reversal of 256338503 is 305833652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256338503 - 2¹⁰ = 256337479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256331503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128169251 + 128169252.

It is an arithmetic number, because the mean of its divisors is an integer number (128169252).

Almost surely, 2^256338503 is an apocalyptic number.

256338503 is a deficient number, since it is larger than the sum of its proper divisors (1).

256338503 is an equidigital number, since it uses as much as digits as its factorization.

256338503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 256338503 is about 16010.5747242252. The cubic root of 256338503 is about 635.2401621178.

The spelling of 256338503 in words is "two hundred fifty-six million, three hundred thirty-eight thousand, five hundred three".