31143221205134 has 16 divisors (see below), whose sum is σ = 46801268799408. Its totient is φ = 15542801341632.

The previous prime is 31143221205119. The next prime is 31143221205139. The reversal of 31143221205134 is 43150212234113.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31143221205134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143221205139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19787594 + ... + 21303410.

It is an arithmetic number, because the mean of its divisors is an integer number (2925079299963).

Almost surely, 2^{31143221205134} is an apocalyptic number.

31143221205134 is a deficient number, since it is larger than the sum of its proper divisors (15658047594274).

31143221205134 is a wasteful number, since it uses less digits than its factorization.

31143221205134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534819.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 31143221205134 its reverse (43150212234113), we get a palindrome (74293433439247).

The spelling of 31143221205134 in words is "thirty-one trillion, one hundred forty-three billion, two hundred twenty-one million, two hundred five thousand, one hundred thirty-four".