31313311222 has 16 divisors (see below), whose sum is σ = 49336733952. Its totient is φ = 14876749800.

The previous prime is 31313311219. The next prime is 31313311241. The reversal of 31313311222 is 22211331313.

It is a super-2 number, since 2×31313311222² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31313311193 and 31313311202.

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, 2247108 + ... + 2260999.

It is an arithmetic number, because the mean of its divisors is an integer number (3083545872).

Almost surely, 2^31313311222 is an apocalyptic number.

31313311222 is a deficient number, since it is larger than the sum of its proper divisors (18023422730).

31313311222 is a wasteful number, since it uses less digits than its factorization.

31313311222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4508283.

The product of its digits is 648, while the sum is 22.

Adding to 31313311222 its reverse (22211331313), we get a palindrome (53524642535).

The spelling of 31313311222 in words is "thirty-one billion, three hundred thirteen million, three hundred eleven thousand, two hundred twenty-two".