31230012 has 48 divisors (see below), whose sum is σ = 80301312. Its totient is φ = 9367680.

The previous prime is 31229999. The next prime is 31230029. The reversal of 31230012 is 21003213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 31230012.

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, 12448 + ... + 14744.

It is an arithmetic number, because the mean of its divisors is an integer number (1672944).

Almost surely, 2^31230012 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 31230012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40150656).

31230012 is an abundant number, since it is smaller than the sum of its proper divisors (49071300).

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

31230012 is a wasteful number, since it uses less digits than its factorization.

31230012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418 (or 2416 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 31230012 is about 5588.3818767153. The cubic root of 31230012 is about 314.9130926789.

Adding to 31230012 its reverse (21003213), we get a palindrome (52233225).

The spelling of 31230012 in words is "thirty-one million, two hundred thirty thousand, twelve".