159981814 has 8 divisors (see below), whose sum is σ = 240308640. Its totient is φ = 79878936.

The previous prime is 159981797. The next prime is 159981817. The reversal of 159981814 is 418189951.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159981817) 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, 54189 + ... + 57064.

It is an arithmetic number, because the mean of its divisors is an integer number (30038580).

Almost surely, 2^159981814 is an apocalyptic number.

159981814 is a deficient number, since it is larger than the sum of its proper divisors (80326826).

159981814 is a wasteful number, since it uses less digits than its factorization.

159981814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111974.

The product of its digits is 103680, while the sum is 46.

The square root of 159981814 is about 12648.3917554763. The cubic root of 159981814 is about 542.8629540402.

The spelling of 159981814 in words is "one hundred fifty-nine million, nine hundred eighty-one thousand, eight hundred fourteen".