31340221420 has 24 divisors (see below), whose sum is σ = 66064721184. Its totient is φ = 12488420736.

The previous prime is 31340221417. The next prime is 31340221447. The reversal of 31340221420 is 2412204313.

It is a junction number, because it is equal to n+sod(n) for n = 31340221391 and 31340221400.

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, 2973849 + ... + 2984368.

It is an arithmetic number, because the mean of its divisors is an integer number (2752696716).

Almost surely, 2^31340221420 is an apocalyptic number.

It is an amenable number.

31340221420 is an abundant number, since it is smaller than the sum of its proper divisors (34724499764).

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

31340221420 is a wasteful number, since it uses less digits than its factorization.

31340221420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5958489 (or 5958487 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 31340221420 its reverse (2412204313), we get a palindrome (33752425733).

The spelling of 31340221420 in words is "thirty-one billion, three hundred forty million, two hundred twenty-one thousand, four hundred twenty".