159971233 has 4 divisors (see below), whose sum is σ = 166926528. Its totient is φ = 153015940.

The previous prime is 159971183. The next prime is 159971269. The reversal of 159971233 is 332179951.

159971233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159971233 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159971293) 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, 3477613 + ... + 3477658.

It is an arithmetic number, because the mean of its divisors is an integer number (41731632).

Almost surely, 2^159971233 is an apocalyptic number.

It is an amenable number.

159971233 is a deficient number, since it is larger than the sum of its proper divisors (6955295).

159971233 is an equidigital number, since it uses as much as digits as its factorization.

159971233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6955294.

The product of its digits is 51030, while the sum is 40.

The square root of 159971233 is about 12647.9734740392. The cubic root of 159971233 is about 542.8509856807.

The spelling of 159971233 in words is "one hundred fifty-nine million, nine hundred seventy-one thousand, two hundred thirty-three".