31143040321231 has 2 divisors, whose sum is σ = 31143040321232. Its totient is φ = 31143040321230.

The previous prime is 31143040321199. The next prime is 31143040321243. The reversal of 31143040321231 is 13212304034113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31143040321231 - 2⁵ = 31143040321199 is a prime.

It is a super-2 number, since 2×31143040321231² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31143040321231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31143040321931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571520160615 + 15571520160616.

It is an arithmetic number, because the mean of its divisors is an integer number (15571520160616).

Almost surely, 2^{31143040321231} is an apocalyptic number.

31143040321231 is a deficient number, since it is larger than the sum of its proper divisors (1).

31143040321231 is an equidigital number, since it uses as much as digits as its factorization.

31143040321231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 31143040321231 its reverse (13212304034113), we get a palindrome (44355344355344).

The spelling of 31143040321231 in words is "thirty-one trillion, one hundred forty-three billion, forty million, three hundred twenty-one thousand, two hundred thirty-one".