31169 has 4 divisors (see below), whose sum is σ = 31680. Its totient is φ = 30660.

The previous prime is 31159. The next prime is 31177. The reversal of 31169 is 96113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96113 = 223 ⋅431.

It is a cyclic number.

It is not a de Polignac number, because 31169 - 2⁴ = 31153 is a prime.

It is a super-2 number, since 2×31169² = 1943013122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 31169.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149 + ... + 290.

It is an arithmetic number, because the mean of its divisors is an integer number (7920).

2³¹¹⁶⁹ is an apocalyptic number.

It is an amenable number.

31169 is a deficient number, since it is larger than the sum of its proper divisors (511).

31169 is an equidigital number, since it uses as much as digits as its factorization.

31169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510.

The product of its digits is 162, while the sum is 20.

The square root of 31169 is about 176.5474440483. The cubic root of 31169 is about 31.4707884056.

It can be divided in two parts, 3116 and 9, that added together give a 5-th power (3125 = 5⁵).

The spelling of 31169 in words is "thirty-one thousand, one hundred sixty-nine".