159921315 has 24 divisors (see below), whose sum is σ = 278205408. Its totient is φ = 84981120.

The previous prime is 159921301. The next prime is 159921379. The reversal of 159921315 is 513129951.

It is a Cunningham number, because it is equal to 12646²-1.

It is not a de Polignac number, because 159921315 - 2⁷ = 159921187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 159921315.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6322 + ... + 18968.

It is an arithmetic number, because the mean of its divisors is an integer number (11591892).

Almost surely, 2^159921315 is an apocalyptic number.

159921315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

159921315 is a deficient number, since it is larger than the sum of its proper divisors (118284093).

159921315 is a wasteful number, since it uses less digits than its factorization.

159921315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12939 (or 12936 counting only the distinct ones).

The product of its digits is 12150, while the sum is 36.

The square root of 159921315 is about 12645.9999604618. Note that the first 4 decimals coincide. The cubic root of 159921315 is about 542.7945154140.

The spelling of 159921315 in words is "one hundred fifty-nine million, nine hundred twenty-one thousand, three hundred fifteen".