31166 has 4 divisors (see below), whose sum is σ = 46752. Its totient is φ = 15582.

The previous prime is 31159. The next prime is 31177. The reversal of 31166 is 66113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66113 = 17 ⋅3889.

It is a plaindrome in base 9, base 13 and base 16.

It is a congruent number.

It is an unprimeable number.

31166 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 7790 + ... + 7793.

It is an arithmetic number, because the mean of its divisors is an integer number (11688).

2³¹¹⁶⁶ is an apocalyptic number.

31166 is a deficient number, since it is larger than the sum of its proper divisors (15586).

31166 is a wasteful number, since it uses less digits than its factorization.

31166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15585.

The product of its digits is 108, while the sum is 17.

The square root of 31166 is about 176.5389475442. The cubic root of 31166 is about 31.4697786909.

Adding to 31166 its reverse (66113), we get a palindrome (97279).

The spelling of 31166 in words is "thirty-one thousand, one hundred sixty-six".