31213133222 has 8 divisors (see below), whose sum is σ = 46835563656. Its totient is φ = 15601278672.

The previous prime is 31213133221. The next prime is 31213133233. The reversal of 31213133222 is 22233131213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213133221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2636588 + ... + 2648399.

It is an arithmetic number, because the mean of its divisors is an integer number (5854445457).

Almost surely, 2^31213133222 is an apocalyptic number.

31213133222 is a deficient number, since it is larger than the sum of its proper divisors (15622430434).

31213133222 is a wasteful number, since it uses less digits than its factorization.

31213133222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287942.

The product of its digits is 1296, while the sum is 23.

Adding to 31213133222 its reverse (22233131213), we get a palindrome (53446264435).

The spelling of 31213133222 in words is "thirty-one billion, two hundred thirteen million, one hundred thirty-three thousand, two hundred twenty-two".