18157159 has 2 divisors, whose sum is σ = 18157160. Its totient is φ = 18157158.

The previous prime is 18157147. The next prime is 18157169. The reversal of 18157159 is 95175181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18157159 - 2⁷ = 18157031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18157109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9078579 + 9078580.

It is an arithmetic number, because the mean of its divisors is an integer number (9078580).

Almost surely, 2^18157159 is an apocalyptic number.

18157159 is a deficient number, since it is larger than the sum of its proper divisors (1).

18157159 is an equidigital number, since it uses as much as digits as its factorization.

18157159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 37.

The square root of 18157159 is about 4261.1218006530. The cubic root of 18157159 is about 262.8346582762.

The spelling of 18157159 in words is "eighteen million, one hundred fifty-seven thousand, one hundred fifty-nine".