31212223332 has 48 divisors (see below), whose sum is σ = 73047199680. Its totient is φ = 10372876672.

The previous prime is 31212223297. The next prime is 31212223333. The reversal of 31212223332 is 23332221213.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (31212223333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11189794 + ... + 11192582.

It is an arithmetic number, because the mean of its divisors is an integer number (1521816660).

Almost surely, 2^31212223332 is an apocalyptic number.

It is an amenable number.

31212223332 is an abundant number, since it is smaller than the sum of its proper divisors (41834976348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31212223332 is a wasteful number, since it uses less digits than its factorization.

31212223332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5260 (or 5258 counting only the distinct ones).

The product of its digits is 2592, while the sum is 24.

Adding to 31212223332 its reverse (23332221213), we get a palindrome (54544444545).

The spelling of 31212223332 in words is "thirty-one billion, two hundred twelve million, two hundred twenty-three thousand, three hundred thirty-two".