159731131 has 12 divisors (see below), whose sum is σ = 186754800. Its totient is φ = 136216080.

The previous prime is 159731087. The next prime is 159731147. The reversal of 159731131 is 131137951.

It is not a de Polignac number, because 159731131 - 2¹¹ = 159729083 is a prime.

It is a super-2 number, since 2×159731131² = 51028068421078322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 159731093 and 159731102.

It is not an unprimeable number, because it can be changed into a prime (159731191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1561 + ... + 17941.

It is an arithmetic number, because the mean of its divisors is an integer number (15562900).

Almost surely, 2^159731131 is an apocalyptic number.

159731131 is a deficient number, since it is larger than the sum of its proper divisors (27023669).

159731131 is a wasteful number, since it uses less digits than its factorization.

159731131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16594 (or 16587 counting only the distinct ones).

The product of its digits is 2835, while the sum is 31.

The square root of 159731131 is about 12638.4781916179. The cubic root of 159731131 is about 542.5792600115.

The spelling of 159731131 in words is "one hundred fifty-nine million, seven hundred thirty-one thousand, one hundred thirty-one".