31323213113222 has 4 divisors (see below), whose sum is σ = 46984819669836. Its totient is φ = 15661606556610.

The previous prime is 31323213113219. The next prime is 31323213113239. The reversal of 31323213113222 is 22231131232313.

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

It is a super-2 number, since 2×31323213113222² (a number of 28 digits) contains 22 as substring.

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, 7830803278304 + ... + 7830803278307.

It is an arithmetic number, because the mean of its divisors is an integer number (11746204917459).

Almost surely, 2^{31323213113222} is an apocalyptic number.

31323213113222 is a deficient number, since it is larger than the sum of its proper divisors (15661606556614).

31323213113222 is a wasteful number, since it uses less digits than its factorization.

31323213113222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15661606556613.

The product of its digits is 7776, while the sum is 29.

Adding to 31323213113222 its reverse (22231131232313), we get a palindrome (53554344345535).

The spelling of 31323213113222 in words is "thirty-one trillion, three hundred twenty-three billion, two hundred thirteen million, one hundred thirteen thousand, two hundred twenty-two".