40831559 has 2 divisors, whose sum is σ = 40831560. Its totient is φ = 40831558.

The previous prime is 40831547. The next prime is 40831561. The reversal of 40831559 is 95513804.

40831559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40831559 - 2⁴ = 40831543 is a prime.

Together with 40831561, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40831459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20415779 + 20415780.

It is an arithmetic number, because the mean of its divisors is an integer number (20415780).

Almost surely, 2^40831559 is an apocalyptic number.

40831559 is a deficient number, since it is larger than the sum of its proper divisors (1).

40831559 is an equidigital number, since it uses as much as digits as its factorization.

40831559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 40831559 is about 6389.9576680914. The cubic root of 40831559 is about 344.3488635669.

The spelling of 40831559 in words is "forty million, eight hundred thirty-one thousand, five hundred fifty-nine".