31113313222 has 4 divisors (see below), whose sum is σ = 46669969836. Its totient is φ = 15556656610.

The previous prime is 31113313157. The next prime is 31113313229. The reversal of 31113313222 is 22231331113.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 31113313193 and 31113313202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113313229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7778328304 + ... + 7778328307.

It is an arithmetic number, because the mean of its divisors is an integer number (11667492459).

Almost surely, 2^31113313222 is an apocalyptic number.

31113313222 is a deficient number, since it is larger than the sum of its proper divisors (15556656614).

31113313222 is a wasteful number, since it uses less digits than its factorization.

31113313222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15556656613.

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

Adding to 31113313222 its reverse (22231331113), we get a palindrome (53344644335).

The spelling of 31113313222 in words is "thirty-one billion, one hundred thirteen million, three hundred thirteen thousand, two hundred twenty-two".