31222044 has 48 divisors (see below), whose sum is σ = 92512000. Its totient is φ = 8920368.

The previous prime is 31222021. The next prime is 31222091. The reversal of 31222044 is 44022213.

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

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 15 ways as a sum of consecutive naturals, for example, 19894 + ... + 21405.

Almost surely, 2^31222044 is an apocalyptic number.

It is an amenable number.

31222044 is an abundant number, since it is smaller than the sum of its proper divisors (61289956).

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

31222044 is a wasteful number, since it uses less digits than its factorization.

31222044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41319 (or 41311 counting only the distinct ones).

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

The square root of 31222044 is about 5587.6689236210. The cubic root of 31222044 is about 314.8863081769.

Adding to 31222044 its reverse (44022213), we get a palindrome (75244257).

The spelling of 31222044 in words is "thirty-one million, two hundred twenty-two thousand, forty-four".