40818523 has 2 divisors, whose sum is σ = 40818524. Its totient is φ = 40818522.

The previous prime is 40818521. The next prime is 40818671. The reversal of 40818523 is 32581804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40818523 - 2¹ = 40818521 is a prime.

Together with 40818521, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40818521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20409261 + 20409262.

It is an arithmetic number, because the mean of its divisors is an integer number (20409262).

Almost surely, 2^40818523 is an apocalyptic number.

40818523 is a deficient number, since it is larger than the sum of its proper divisors (1).

40818523 is an equidigital number, since it uses as much as digits as its factorization.

40818523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 40818523 is about 6388.9375486070. The cubic root of 40818523 is about 344.3122137329.

The spelling of 40818523 in words is "forty million, eight hundred eighteen thousand, five hundred twenty-three".