159815 has 4 divisors (see below), whose sum is σ = 191784. Its totient is φ = 127848.

The previous prime is 159811. The next prime is 159833. The reversal of 159815 is 518951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 518951 = 79 ⋅6569.

It is a cyclic number.

It is not a de Polignac number, because 159815 - 2² = 159811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 159815.

It is not an unprimeable number, because it can be changed into a prime (159811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15977 + ... + 15986.

It is an arithmetic number, because the mean of its divisors is an integer number (47946).

2¹⁵⁹⁸¹⁵ is an apocalyptic number.

159815 is a deficient number, since it is larger than the sum of its proper divisors (31969).

159815 is an equidigital number, since it uses as much as digits as its factorization.

159815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31968.

The product of its digits is 1800, while the sum is 29.

The square root of 159815 is about 399.7686831156. The cubic root of 159815 is about 54.2674206266.

The spelling of 159815 in words is "one hundred fifty-nine thousand, eight hundred fifteen".