31159 has 2 divisors, whose sum is σ = 31160.
Its totient is φ = 31158.
The previous prime is 31153. The next prime is 31177. The reversal of 31159 is 95113.
It can be divided in two parts, 31 and 159, that added together give a triangular number (190 = T19).
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 31159 - 23 = 31151 is a prime.
It is a plaindrome in base 13.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (31151) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15579 + 15580.
It is an arithmetic number, because the mean of its divisors is an integer number (15580).
231159 is an apocalyptic number.
31159 is a deficient number, since it is larger than the sum of its proper divisors (1).
31159 is an equidigital number, since it uses as much as digits as its factorization.
31159 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 135, while the sum is 19.
The square root of 31159 is about 176.5191207773.
The cubic root of 31159 is about 31.4674224379.
The spelling of 31159 in words is "thirty-one thousand, one hundred fifty-nine".