31132012222 has 4 divisors (see below), whose sum is σ = 46698018336. Its totient is φ = 15566006110.

The previous prime is 31132012193. The next prime is 31132012231. The reversal of 31132012222 is 22221023113.

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

It is a self number, because there is not a number n which added to its sum of digits gives 31132012222.

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, 7783003054 + ... + 7783003057.

It is an arithmetic number, because the mean of its divisors is an integer number (11674504584).

Almost surely, 2^31132012222 is an apocalyptic number.

31132012222 is a deficient number, since it is larger than the sum of its proper divisors (15566006114).

31132012222 is a wasteful number, since it uses less digits than its factorization.

31132012222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15566006113.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31132012222 its reverse (22221023113), we get a palindrome (53353035335).

The spelling of 31132012222 in words is "thirty-one billion, one hundred thirty-two million, twelve thousand, two hundred twenty-two".