31112212 has 12 divisors (see below), whose sum is σ = 54531540. Its totient is φ = 15531776.

The previous prime is 31112209. The next prime is 31112281. The reversal of 31112212 is 21221113.

It can be written as a sum of positive squares in 2 ways, for example, as 21846276 + 9265936 = 4674^2 + 3044^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31112192 and 31112201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3037 + ... + 8452.

It is an arithmetic number, because the mean of its divisors is an integer number (4544295).

Almost surely, 2^31112212 is an apocalyptic number.

It is an amenable number.

31112212 is a deficient number, since it is larger than the sum of its proper divisors (23419328).

31112212 is a wasteful number, since it uses less digits than its factorization.

31112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12170 (or 12168 counting only the distinct ones).

The product of its digits is 24, while the sum is 13.

The square root of 31112212 is about 5577.8321953963. The cubic root of 31112212 is about 314.5166417323.

Adding to 31112212 its reverse (21221113), we get a palindrome (52333325).

The spelling of 31112212 in words is "thirty-one million, one hundred twelve thousand, two hundred twelve".