256364503 has 2 divisors, whose sum is σ = 256364504. Its totient is φ = 256364502.

The previous prime is 256364491. The next prime is 256364519. The reversal of 256364503 is 305463652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256364503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256364803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128182251 + 128182252.

It is an arithmetic number, because the mean of its divisors is an integer number (128182252).

Almost surely, 2^256364503 is an apocalyptic number.

256364503 is a deficient number, since it is larger than the sum of its proper divisors (1).

256364503 is an equidigital number, since it uses as much as digits as its factorization.

256364503 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 34.

The square root of 256364503 is about 16011.3866669942. The cubic root of 256364503 is about 635.2616385193.

The spelling of 256364503 in words is "two hundred fifty-six million, three hundred sixty-four thousand, five hundred three".