31224116 has 24 divisors (see below), whose sum is σ = 68126016. Its totient is φ = 12165120.

The previous prime is 31224113. The next prime is 31224199. The reversal of 31224116 is 61142213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31224113) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 50381 + ... + 50996.

It is an arithmetic number, because the mean of its divisors is an integer number (2838584).

Almost surely, 2^31224116 is an apocalyptic number.

It is an amenable number.

31224116 is an abundant number, since it is smaller than the sum of its proper divisors (36901900).

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

31224116 is a wasteful number, since it uses less digits than its factorization.

31224116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101399 (or 101397 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 31224116 is about 5587.8543288099. The cubic root of 31224116 is about 314.8932736615.

Adding to 31224116 its reverse (61142213), we get a palindrome (92366329).

The spelling of 31224116 in words is "thirty-one million, two hundred twenty-four thousand, one hundred sixteen".