31020423143 has 2 divisors, whose sum is σ = 31020423144. Its totient is φ = 31020423142.

The previous prime is 31020423139. The next prime is 31020423211. The reversal of 31020423143 is 34132402013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31020423143 - 2² = 31020423139 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31020423943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510211571 + 15510211572.

It is an arithmetic number, because the mean of its divisors is an integer number (15510211572).

Almost surely, 2^31020423143 is an apocalyptic number.

31020423143 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020423143 is an equidigital number, since it uses as much as digits as its factorization.

31020423143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31020423143 its reverse (34132402013), we get a palindrome (65152825156).

The spelling of 31020423143 in words is "thirty-one billion, twenty million, four hundred twenty-three thousand, one hundred forty-three".