40731871 has 2 divisors, whose sum is σ = 40731872. Its totient is φ = 40731870.

The previous prime is 40731869. The next prime is 40731893. The reversal of 40731871 is 17813704.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40731871 - 2¹ = 40731869 is a prime.

Together with 40731869, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40731841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20365935 + 20365936.

It is an arithmetic number, because the mean of its divisors is an integer number (20365936).

Almost surely, 2^40731871 is an apocalyptic number.

40731871 is a deficient number, since it is larger than the sum of its proper divisors (1).

40731871 is an equidigital number, since it uses as much as digits as its factorization.

40731871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 40731871 is about 6382.1525365663. The cubic root of 40731871 is about 344.0683989419.

The spelling of 40731871 in words is "forty million, seven hundred thirty-one thousand, eight hundred seventy-one".