31142220412 has 24 divisors (see below), whose sum is σ = 55782031536. Its totient is φ = 15204701568.

The previous prime is 31142220397. The next prime is 31142220449. The reversal of 31142220412 is 21402224113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635658 + ... + 682894.

It is an arithmetic number, because the mean of its divisors is an integer number (2324251314).

Almost surely, 2^31142220412 is an apocalyptic number.

It is an amenable number.

31142220412 is a deficient number, since it is larger than the sum of its proper divisors (24639811124).

31142220412 is a wasteful number, since it uses less digits than its factorization.

31142220412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51117 (or 51115 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 31142220412 its reverse (21402224113), we get a palindrome (52544444525).

The spelling of 31142220412 in words is "thirty-one billion, one hundred forty-two million, two hundred twenty thousand, four hundred twelve".