31244224220 has 48 divisors (see below), whose sum is σ = 72058140000. Its totient is φ = 11285272320.

The previous prime is 31244224201. The next prime is 31244224223. The reversal of 31244224220 is 2242244213.

It is a self number, because there is not a number n which added to its sum of digits gives 31244224220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31244224223) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 443795 + ... + 509354.

It is an arithmetic number, because the mean of its divisors is an integer number (1501211250).

Almost surely, 2^31244224220 is an apocalyptic number.

It is an amenable number.

31244224220 is an abundant number, since it is smaller than the sum of its proper divisors (40813915780).

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

31244224220 is a wasteful number, since it uses less digits than its factorization.

31244224220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953318 (or 953316 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 31244224220 its reverse (2242244213), we get a palindrome (33486468433).

The spelling of 31244224220 in words is "thirty-one billion, two hundred forty-four million, two hundred twenty-four thousand, two hundred twenty".