31331213141 has 2 divisors, whose sum is σ = 31331213142. Its totient is φ = 31331213140.

The previous prime is 31331213113. The next prime is 31331213189. The reversal of 31331213141 is 14131213313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30565528900 + 765684241 = 174830^2 + 27671^2 .

It is a cyclic number.

It is not a de Polignac number, because 31331213141 - 2⁶ = 31331213077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31331213191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15665606570 + 15665606571.

It is an arithmetic number, because the mean of its divisors is an integer number (15665606571).

Almost surely, 2^31331213141 is an apocalyptic number.

It is an amenable number.

31331213141 is a deficient number, since it is larger than the sum of its proper divisors (1).

31331213141 is an equidigital number, since it uses as much as digits as its factorization.

31331213141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

Adding to 31331213141 its reverse (14131213313), we get a palindrome (45462426454).

The spelling of 31331213141 in words is "thirty-one billion, three hundred thirty-one million, two hundred thirteen thousand, one hundred forty-one".