159381813 has 8 divisors (see below), whose sum is σ = 213202528. Its totient is φ = 105907824.

The previous prime is 159381809. The next prime is 159381857. The reversal of 159381813 is 318183951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 159381813 - 2² = 159381809 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 (159381863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85606 + ... + 87447.

It is an arithmetic number, because the mean of its divisors is an integer number (26650316).

Almost surely, 2^159381813 is an apocalyptic number.

It is an amenable number.

159381813 is a deficient number, since it is larger than the sum of its proper divisors (53820715).

159381813 is a wasteful number, since it uses less digits than its factorization.

159381813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173363.

The product of its digits is 25920, while the sum is 39.

The square root of 159381813 is about 12624.6510050773. The cubic root of 159381813 is about 542.1834468876.

The spelling of 159381813 in words is "one hundred fifty-nine million, three hundred eighty-one thousand, eight hundred thirteen".