31033212 has 48 divisors (see below), whose sum is σ = 83435520. Its totient is φ = 8793792.

The previous prime is 31033199. The next prime is 31033217. The reversal of 31033212 is 21233013.

It is a junction number, because it is equal to n+sod(n) for n = 31033191 and 31033200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31033217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9214 + ... + 12122.

It is an arithmetic number, because the mean of its divisors is an integer number (1738240).

Almost surely, 2^31033212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31033212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41717760).

31033212 is an abundant number, since it is smaller than the sum of its proper divisors (52402308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31033212 is a wasteful number, since it uses less digits than its factorization.

31033212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3050 (or 3048 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 31033212 is about 5570.7460900673. The cubic root of 31033212 is about 314.2502096453.

Adding to 31033212 its reverse (21233013), we get a palindrome (52266225).

The spelling of 31033212 in words is "thirty-one million, thirty-three thousand, two hundred twelve".