40818541 has 4 divisors (see below), whose sum is σ = 40862592. Its totient is φ = 40774492.

The previous prime is 40818523. The next prime is 40818671. The reversal of 40818541 is 14581804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40818541 - 2¹¹ = 40816493 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a 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 in 3 ways as a sum of consecutive naturals, for example, 20605 + ... + 22498.

It is an arithmetic number, because the mean of its divisors is an integer number (10215648).

Almost surely, 2^40818541 is an apocalyptic number.

It is an amenable number.

40818541 is a deficient number, since it is larger than the sum of its proper divisors (44051).

40818541 is an equidigital number, since it uses as much as digits as its factorization.

40818541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44050.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 40818541 is about 6388.9389572917. The cubic root of 40818541 is about 344.3122643440.

The spelling of 40818541 in words is "forty million, eight hundred eighteen thousand, five hundred forty-one".