41821805 has 4 divisors (see below), whose sum is σ = 50186172. Its totient is φ = 33457440.

The previous prime is 41821789. The next prime is 41821807. The reversal of 41821805 is 50812814.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16801801 + 25020004 = 4099^2 + 5002^2 .

It is not a de Polignac number, because 41821805 - 2⁴ = 41821789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41821807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4182176 + ... + 4182185.

It is an arithmetic number, because the mean of its divisors is an integer number (12546543).

Almost surely, 2^41821805 is an apocalyptic number.

It is an amenable number.

41821805 is a deficient number, since it is larger than the sum of its proper divisors (8364367).

41821805 is an equidigital number, since it uses as much as digits as its factorization.

41821805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8364366.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 41821805 is about 6466.9780423317. The cubic root of 41821805 is about 347.1103719191.

The spelling of 41821805 in words is "forty-one million, eight hundred twenty-one thousand, eight hundred five".