40431537192971 has 2 divisors, whose sum is σ = 40431537192972. Its totient is φ = 40431537192970.

The previous prime is 40431537192941. The next prime is 40431537192973. The reversal of 40431537192971 is 17929173513404.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40431537192971 is a prime.

It is a Sophie Germain prime.

Together with 40431537192973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40431537192973) 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 as a sum of consecutive naturals, namely, 20215768596485 + 20215768596486.

It is an arithmetic number, because the mean of its divisors is an integer number (20215768596486).

Almost surely, 2^{40431537192971} is an apocalyptic number.

40431537192971 is a deficient number, since it is larger than the sum of its proper divisors (1).

40431537192971 is an equidigital number, since it uses as much as digits as its factorization.

40431537192971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5715360, while the sum is 56.

The spelling of 40431537192971 in words is "forty trillion, four hundred thirty-one billion, five hundred thirty-seven million, one hundred ninety-two thousand, nine hundred seventy-one".