16318559 has 2 divisors, whose sum is σ = 16318560. Its totient is φ = 16318558.

The previous prime is 16318553. The next prime is 16318567. The reversal of 16318559 is 95581361.

16318559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16318559 - 2⁸ = 16318303 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16318553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8159279 + 8159280.

It is an arithmetic number, because the mean of its divisors is an integer number (8159280).

Almost surely, 2^16318559 is an apocalyptic number.

16318559 is a deficient number, since it is larger than the sum of its proper divisors (1).

16318559 is an equidigital number, since it uses as much as digits as its factorization.

16318559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 38.

The square root of 16318559 is about 4039.6236210815. The cubic root of 16318559 is about 253.6455624317.

The spelling of 16318559 in words is "sixteen million, three hundred eighteen thousand, five hundred fifty-nine".