31143452343412 has 6 divisors (see below), whose sum is σ = 54501041600978. Its totient is φ = 15571726171704.

The previous prime is 31143452343337. The next prime is 31143452343413. The reversal of 31143452343412 is 21434325434113.

It can be written as a sum of positive squares in only one way, i.e., 22604281324816 + 8539171018596 = 4754396^2 + 2922186^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143452343413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3892931542923 + ... + 3892931542930.

Almost surely, 2^{31143452343412} is an apocalyptic number.

It is an amenable number.

31143452343412 is a deficient number, since it is larger than the sum of its proper divisors (23357589257566).

31143452343412 is a wasteful number, since it uses less digits than its factorization.

31143452343412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7785863085857 (or 7785863085855 counting only the distinct ones).

The product of its digits is 414720, while the sum is 40.

Adding to 31143452343412 its reverse (21434325434113), we get a palindrome (52577777777525).

The spelling of 31143452343412 in words is "thirty-one trillion, one hundred forty-three billion, four hundred fifty-two million, three hundred forty-three thousand, four hundred twelve".