159665515 has 4 divisors (see below), whose sum is σ = 191598624. Its totient is φ = 127732408.

The previous prime is 159665453. The next prime is 159665567. The reversal of 159665515 is 515566951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 515566951 = 4297 ⋅119983.

It is a cyclic number.

It is not a de Polignac number, because 159665515 - 2¹¹ = 159663467 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15966547 + ... + 15966556.

It is an arithmetic number, because the mean of its divisors is an integer number (47899656).

Almost surely, 2^159665515 is an apocalyptic number.

159665515 is a deficient number, since it is larger than the sum of its proper divisors (31933109).

159665515 is an equidigital number, since it uses as much as digits as its factorization.

159665515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31933108.

The product of its digits is 202500, while the sum is 43.

The square root of 159665515 is about 12635.8820428176. The cubic root of 159665515 is about 542.5049544027.

The spelling of 159665515 in words is "one hundred fifty-nine million, six hundred sixty-five thousand, five hundred fifteen".