40505031271 has 2 divisors, whose sum is σ = 40505031272. Its totient is φ = 40505031270.

The previous prime is 40505031263. The next prime is 40505031311. The reversal of 40505031271 is 17213050504.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40505031271 - 2³ = 40505031263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40505031211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20252515635 + 20252515636.

It is an arithmetic number, because the mean of its divisors is an integer number (20252515636).

Almost surely, 2^40505031271 is an apocalyptic number.

40505031271 is a deficient number, since it is larger than the sum of its proper divisors (1).

40505031271 is an equidigital number, since it uses as much as digits as its factorization.

40505031271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 28.

Adding to 40505031271 its reverse (17213050504), we get a palindrome (57718081775).

The spelling of 40505031271 in words is "forty billion, five hundred five million, thirty-one thousand, two hundred seventy-one".