41021813 has 4 divisors (see below), whose sum is σ = 46882080. Its totient is φ = 35161548.

The previous prime is 41021807. The next prime is 41021821. The reversal of 41021813 is 31812014.

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 41021813 - 2⁴ = 41021797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41021413) 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, 2930123 + ... + 2930136.

It is an arithmetic number, because the mean of its divisors is an integer number (11720520).

Almost surely, 2^41021813 is an apocalyptic number.

It is an amenable number.

41021813 is a deficient number, since it is larger than the sum of its proper divisors (5860267).

41021813 is an equidigital number, since it uses as much as digits as its factorization.

41021813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5860266.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 41021813 is about 6404.8273200766. The cubic root of 41021813 is about 344.8828643860.

Adding to 41021813 its reverse (31812014), we get a palindrome (72833827).

The spelling of 41021813 in words is "forty-one million, twenty-one thousand, eight hundred thirteen".