31443223031012 has 72 divisors (see below), whose sum is σ = 61421856589800. Its totient is φ = 14067539785728.

The previous prime is 31443223030993. The next prime is 31443223031063. The reversal of 31443223031012 is 21013032234413.

It can be written as a sum of positive squares in 12 ways, for example, as 10704452758756 + 20738770272256 = 3271766^2 + 4553984^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4391564 + ... + 9064892.

It is an arithmetic number, because the mean of its divisors is an integer number (853081341525).

Almost surely, 2^{31443223031012} is an apocalyptic number.

It is an amenable number.

31443223031012 is a deficient number, since it is larger than the sum of its proper divisors (29978633558788).

31443223031012 is a wasteful number, since it uses less digits than its factorization.

31443223031012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4673665 (or 4673650 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 31443223031012 its reverse (21013032234413), we get a palindrome (52456255265425).

The spelling of 31443223031012 in words is "thirty-one trillion, four hundred forty-three billion, two hundred twenty-three million, thirty-one thousand, twelve".