159543631 has 16 divisors (see below), whose sum is σ = 176631840. Its totient is φ = 143176320.

The previous prime is 159543607. The next prime is 159543649. The reversal of 159543631 is 136345951.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 159543631 - 2⁹ = 159543119 is a prime.

It is a super-2 number, since 2×159543631² = 50908340385328322, 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 (159543031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149841 + ... + 150901.

It is an arithmetic number, because the mean of its divisors is an integer number (11039490).

Almost surely, 2^159543631 is an apocalyptic number.

159543631 is a deficient number, since it is larger than the sum of its proper divisors (17088209).

159543631 is a wasteful number, since it uses less digits than its factorization.

159543631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386.

The product of its digits is 48600, while the sum is 37.

The square root of 159543631 is about 12631.0581900330. The cubic root of 159543631 is about 542.3668751053.

The spelling of 159543631 in words is "one hundred fifty-nine million, five hundred forty-three thousand, six hundred thirty-one".