159970217 has 8 divisors (see below), whose sum is σ = 174642912. Its totient is φ = 145319200.

The previous prime is 159970189. The next prime is 159970241. The reversal of 159970217 is 712079951.

It is a happy number.

159970217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159970217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159970297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12653 + ... + 21909.

It is an arithmetic number, because the mean of its divisors is an integer number (21830364).

Almost surely, 2^159970217 is an apocalyptic number.

It is an amenable number.

159970217 is a deficient number, since it is larger than the sum of its proper divisors (14672695).

159970217 is a wasteful number, since it uses less digits than its factorization.

159970217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10839.

The product of its (nonzero) digits is 39690, while the sum is 41.

The square root of 159970217 is about 12647.9333094383. The cubic root of 159970217 is about 542.8498364371.

The spelling of 159970217 in words is "one hundred fifty-nine million, nine hundred seventy thousand, two hundred seventeen".