41381821 has 8 divisors (see below), whose sum is σ = 45007704. Its totient is φ = 37819200.

The previous prime is 41381801. The next prime is 41381827. The reversal of 41381821 is 12818314.

It can be written as a sum of positive squares in 4 ways, for example, as 3115225 + 38266596 = 1765^2 + 6186^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 41381821 - 2⁵ = 41381789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 41381821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41381827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14446 + ... + 17071.

It is an arithmetic number, because the mean of its divisors is an integer number (5625963).

Almost surely, 2^41381821 is an apocalyptic number.

It is an amenable number.

41381821 is a deficient number, since it is larger than the sum of its proper divisors (3625883).

41381821 is a wasteful number, since it uses less digits than its factorization.

41381821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31631.

The product of its digits is 1536, while the sum is 28.

The square root of 41381821 is about 6432.8703546706. The cubic root of 41381821 is about 345.8888262558. Note that the first 4 decimals are identical.

The spelling of 41381821 in words is "forty-one million, three hundred eighty-one thousand, eight hundred twenty-one".