31422424220 has 24 divisors (see below), whose sum is σ = 71985917808. Its totient is φ = 11426336000.

The previous prime is 31422424213. The next prime is 31422424261. The reversal of 31422424220 is 2242422413.

It is a self number, because there is not a number n which added to its sum of digits gives 31422424220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71414381 + ... + 71414820.

It is an arithmetic number, because the mean of its divisors is an integer number (2999413242).

Almost surely, 2^31422424220 is an apocalyptic number.

It is an amenable number.

31422424220 is an abundant number, since it is smaller than the sum of its proper divisors (40563493588).

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

31422424220 is a wasteful number, since it uses less digits than its factorization.

31422424220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142829221 (or 142829219 counting only the distinct ones).

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

Adding to 31422424220 its reverse (2242422413), we get a palindrome (33664846633).

The spelling of 31422424220 in words is "thirty-one billion, four hundred twenty-two million, four hundred twenty-four thousand, two hundred twenty".