31343 has 4 divisors (see below), whose sum is σ = 33768. Its totient is φ = 28920.

The previous prime is 31337. The next prime is 31357. The reversal of 31343 is 34313.

It is a happy number.

31343 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31343 - 2⁴ = 31327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31333) 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 in 3 ways as a sum of consecutive naturals, for example, 1193 + ... + 1218.

It is an arithmetic number, because the mean of its divisors is an integer number (8442).

2³¹³⁴³ is an apocalyptic number.

31343 is a deficient number, since it is larger than the sum of its proper divisors (2425).

31343 is a wasteful number, since it uses less digits than its factorization.

31343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424.

The product of its digits is 108, while the sum is 14.

The square root of 31343 is about 177.0395436054. The cubic root of 31343 is about 31.5292413445.

Subtracting from 31343 its sum of digits (14), we obtain a square (31329 = 177²).

Adding to 31343 its reverse (34313), we get a palindrome (65656).

The spelling of 31343 in words is "thirty-one thousand, three hundred forty-three".