31422343220 has 48 divisors (see below), whose sum is σ = 66933269760. Its totient is φ = 12389210496.

The previous prime is 31422343219. The next prime is 31422343223. The reversal of 31422343220 is 2234322413.

It is a self number, because there is not a number n which added to its sum of digits gives 31422343220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31422343223) 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, 952319 + ... + 984761.

It is an arithmetic number, because the mean of its divisors is an integer number (1394443120).

Almost surely, 2^31422343220 is an apocalyptic number.

It is an amenable number.

31422343220 is an abundant number, since it is smaller than the sum of its proper divisors (35510926540).

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

31422343220 is a wasteful number, since it uses less digits than its factorization.

31422343220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33144 (or 33142 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 31422343220 its reverse (2234322413), we get a palindrome (33656665633).

The spelling of 31422343220 in words is "thirty-one billion, four hundred twenty-two million, three hundred forty-three thousand, two hundred twenty".