31533344223412 has 6 divisors (see below), whose sum is σ = 55183352390978. Its totient is φ = 15766672111704.

The previous prime is 31533344223391. The next prime is 31533344223419. The reversal of 31533344223412 is 21432244333513.

It can be written as a sum of positive squares in only one way, i.e., 31523216618916 + 10127604496 = 5614554^2 + 100636^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31533344223419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3941668027923 + ... + 3941668027930.

Almost surely, 2^{31533344223412} is an apocalyptic number.

It is an amenable number.

31533344223412 is a deficient number, since it is larger than the sum of its proper divisors (23650008167566).

31533344223412 is a wasteful number, since it uses less digits than its factorization.

31533344223412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7883336055857 (or 7883336055855 counting only the distinct ones).

The product of its digits is 622080, while the sum is 40.

Adding to 31533344223412 its reverse (21432244333513), we get a palindrome (52965588556925).

The spelling of 31533344223412 in words is "thirty-one trillion, five hundred thirty-three billion, three hundred forty-four million, two hundred twenty-three thousand, four hundred twelve".