159988431 has 4 divisors (see below), whose sum is σ = 213317912. Its totient is φ = 106658952.

The previous prime is 159988399. The next prime is 159988441. The reversal of 159988431 is 134889951.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 159988431 - 2⁵ = 159988399 is a prime.

It is a super-2 number, since 2×159988431² = 51192596107683522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159988441) 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, 26664736 + ... + 26664741.

It is an arithmetic number, because the mean of its divisors is an integer number (53329478).

Almost surely, 2^159988431 is an apocalyptic number.

159988431 is a deficient number, since it is larger than the sum of its proper divisors (53329481).

159988431 is an equidigital number, since it uses as much as digits as its factorization.

159988431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53329480.

The product of its digits is 311040, while the sum is 48.

The square root of 159988431 is about 12648.6533275286. The cubic root of 159988431 is about 542.8704383797.

The spelling of 159988431 in words is "one hundred fifty-nine million, nine hundred eighty-eight thousand, four hundred thirty-one".