31044222 has 48 divisors (see below), whose sum is σ = 76108032. Its totient is φ = 9405720.

The previous prime is 31044197. The next prime is 31044259. The reversal of 31044222 is 22244013.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31044195 and 31044204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2443 + ... + 8249.

It is an arithmetic number, because the mean of its divisors is an integer number (1585584).

Almost surely, 2^31044222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31044222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38054016).

31044222 is an abundant number, since it is smaller than the sum of its proper divisors (45063810).

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

31044222 is a wasteful number, since it uses less digits than its factorization.

31044222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5835 (or 5823 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 31044222 is about 5571.7342004083. The cubic root of 31044222 is about 314.2873686060.

Adding to 31044222 its reverse (22244013), we get a palindrome (53288235).

The spelling of 31044222 in words is "thirty-one million, forty-four thousand, two hundred twenty-two".