159940015 has 4 divisors (see below), whose sum is σ = 191928024. Its totient is φ = 127952008.

The previous prime is 159940009. The next prime is 159940019. The reversal of 159940015 is 510049951.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 159940015 - 2⁹ = 159939503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159940019) 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, 15993997 + ... + 15994006.

It is an arithmetic number, because the mean of its divisors is an integer number (47982006).

Almost surely, 2^159940015 is an apocalyptic number.

159940015 is a deficient number, since it is larger than the sum of its proper divisors (31988009).

159940015 is an equidigital number, since it uses as much as digits as its factorization.

159940015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31988008.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 159940015 is about 12646.7393030773. The cubic root of 159940015 is about 542.8156713636.

Adding to 159940015 its reverse (510049951), we get a palindrome (669989966).

It can be divided in two parts, 1599 and 40015, that added together give a palindrome (41614).

The spelling of 159940015 in words is "one hundred fifty-nine million, nine hundred forty thousand, fifteen".