41221818 has 64 divisors (see below), whose sum is σ = 103420800. Its totient is φ = 12055680.

The previous prime is 41221801. The next prime is 41221823. The reversal of 41221818 is 81812214.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 41221791 and 41221800.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 16030 + ... + 18422.

It is an arithmetic number, because the mean of its divisors is an integer number (1615950).

Almost surely, 2^41221818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 41221818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51710400).

41221818 is an abundant number, since it is smaller than the sum of its proper divisors (62198982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

41221818 is a wasteful number, since it uses less digits than its factorization.

41221818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444 (or 2438 counting only the distinct ones).

The product of its digits is 1024, while the sum is 27.

The square root of 41221818 is about 6420.4219487507. The cubic root of 41221818 is about 345.4424568883.

The spelling of 41221818 in words is "forty-one million, two hundred twenty-one thousand, eight hundred eighteen".