31130213222 has 16 divisors (see below), whose sum is σ = 46893728112. Its totient is φ = 15499071360.

The previous prime is 31130213209. The next prime is 31130213249. The reversal of 31130213222 is 22231203113.

It is a junction number, because it is equal to n+sod(n) for n = 31130213194 and 31130213203.

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, 609722 + ... + 658802.

It is an arithmetic number, because the mean of its divisors is an integer number (2930858007).

Almost surely, 2^31130213222 is an apocalyptic number.

31130213222 is a deficient number, since it is larger than the sum of its proper divisors (15763514890).

31130213222 is a wasteful number, since it uses less digits than its factorization.

31130213222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50423.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31130213222 its reverse (22231203113), we get a palindrome (53361416335).

The spelling of 31130213222 in words is "thirty-one billion, one hundred thirty million, two hundred thirteen thousand, two hundred twenty-two".