31233012 has 48 divisors (see below), whose sum is σ = 77579712. Its totient is φ = 9745920.

The previous prime is 31232989. The next prime is 31233023. The reversal of 31233012 is 21033213.

It is a junction number, because it is equal to n+sod(n) for n = 31232982 and 31233000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57462 + ... + 58002.

It is an arithmetic number, because the mean of its divisors is an integer number (1616244).

Almost surely, 2^31233012 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 31233012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38789856).

31233012 is an abundant number, since it is smaller than the sum of its proper divisors (46346700).

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

31233012 is a wasteful number, since it uses less digits than its factorization.

31233012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848 (or 846 counting only the distinct ones).

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

The square root of 31233012 is about 5588.6502842815. The cubic root of 31233012 is about 314.9231760246.

Adding to 31233012 its reverse (21033213), we get a palindrome (52266225).

The spelling of 31233012 in words is "thirty-one million, two hundred thirty-three thousand, twelve".