31223030312 has 64 divisors (see below), whose sum is σ = 61084774080. Its totient is φ = 14950559232.

The previous prime is 31223030291. The next prime is 31223030329. The reversal of 31223030312 is 21303032213.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4340783 + ... + 4347969.

It is an arithmetic number, because the mean of its divisors is an integer number (954449595).

Almost surely, 2^31223030312 is an apocalyptic number.

It is an amenable number.

31223030312 is a deficient number, since it is larger than the sum of its proper divisors (29861743768).

31223030312 is a wasteful number, since it uses less digits than its factorization.

31223030312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7482 (or 7478 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31223030312 its reverse (21303032213), we get a palindrome (52526062525).

The spelling of 31223030312 in words is "thirty-one billion, two hundred twenty-three million, thirty thousand, three hundred twelve".