31424044220 has 12 divisors (see below), whose sum is σ = 65990492904. Its totient is φ = 12569617680.

The previous prime is 31424044217. The next prime is 31424044277. The reversal of 31424044220 is 2244042413.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31424044220.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 785601086 + ... + 785601125.

It is an arithmetic number, because the mean of its divisors is an integer number (5499207742).

Almost surely, 2^31424044220 is an apocalyptic number.

It is an amenable number.

31424044220 is an abundant number, since it is smaller than the sum of its proper divisors (34566448684).

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

31424044220 is a wasteful number, since it uses less digits than its factorization.

31424044220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571202220 (or 1571202218 counting only the distinct ones).

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

Adding to 31424044220 its reverse (2244042413), we get a palindrome (33668086633).

The spelling of 31424044220 in words is "thirty-one billion, four hundred twenty-four million, forty-four thousand, two hundred twenty".