31229 has 8 divisors (see below), whose sum is σ = 36288. Its totient is φ = 26560.

The previous prime is 31223. The next prime is 31231. The reversal of 31229 is 92213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104 + ... + 270.

It is an arithmetic number, because the mean of its divisors is an integer number (4536).

2³¹²²⁹ is an apocalyptic number.

It is an amenable number.

31229 is a deficient number, since it is larger than the sum of its proper divisors (5059).

31229 is a wasteful number, since it uses less digits than its factorization.

31229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195.

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

The square root of 31229 is about 176.7172883450. The cubic root of 31229 is about 31.4909691085.

The spelling of 31229 in words is "thirty-one thousand, two hundred twenty-nine".