159931 has 2 divisors, whose sum is σ = 159932. Its totient is φ = 159930.

The previous prime is 159911. The next prime is 159937. The reversal of 159931 is 139951.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 159931 - 2⁵ = 159899 is a prime.

It is a super-2 number, since 2×159931² = 51155849522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 159931.

It is not a weakly prime, because it can be changed into another prime (159937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79965 + 79966.

It is an arithmetic number, because the mean of its divisors is an integer number (79966).

2¹⁵⁹⁹³¹ is an apocalyptic number.

159931 is a deficient number, since it is larger than the sum of its proper divisors (1).

159931 is an equidigital number, since it uses as much as digits as its factorization.

159931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1215, while the sum is 28.

The square root of 159931 is about 399.9137406992. The cubic root of 159931 is about 54.2805472592.

The spelling of 159931 in words is "one hundred fifty-nine thousand, nine hundred thirty-one".