31244212 has 24 divisors (see below), whose sum is σ = 57254400. Its totient is φ = 14890656.

The previous prime is 31244209. The next prime is 31244221. The reversal of 31244212 is 21244213.

It is a self number, because there is not a number n which added to its sum of digits gives 31244212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43714 + ... + 44422.

It is an arithmetic number, because the mean of its divisors is an integer number (2385600).

Almost surely, 2^31244212 is an apocalyptic number.

It is an amenable number.

31244212 is a deficient number, since it is larger than the sum of its proper divisors (26010188).

31244212 is a wasteful number, since it uses less digits than its factorization.

31244212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215 (or 1213 counting only the distinct ones).

The product of its digits is 384, while the sum is 19.

The square root of 31244212 is about 5589.6522253178. The cubic root of 31244212 is about 314.9608148116.

Adding to 31244212 its reverse (21244213), we get a palindrome (52488425).

Subtracting from 31244212 its reverse (21244213), we obtain a palindrome (9999999).

The spelling of 31244212 in words is "thirty-one million, two hundred forty-four thousand, two hundred twelve".