31132013222 has 4 divisors (see below), whose sum is σ = 46698019836. Its totient is φ = 15566006610.

The previous prime is 31132013183. The next prime is 31132013233. The reversal of 31132013222 is 22231023113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22231023113 = 13 ⋅1710078701.

It is a junction number, because it is equal to n+sod(n) for n = 31132013194 and 31132013203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7783003304 + ... + 7783003307.

It is an arithmetic number, because the mean of its divisors is an integer number (11674504959).

Almost surely, 2^31132013222 is an apocalyptic number.

31132013222 is a deficient number, since it is larger than the sum of its proper divisors (15566006614).

31132013222 is a wasteful number, since it uses less digits than its factorization.

31132013222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15566006613.

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

Adding to 31132013222 its reverse (22231023113), we get a palindrome (53363036335).

The spelling of 31132013222 in words is "thirty-one billion, one hundred thirty-two million, thirteen thousand, two hundred twenty-two".