44205421 has 16 divisors (see below), whose sum is σ = 49130928. Its totient is φ = 39513600.

The previous prime is 44205383. The next prime is 44205431. The reversal of 44205421 is 12450244.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 10692900 + 33512521 = 3270^2 + 5789^2 .

It is a 5-Lehmer number, since φ(44205421) divides (44205421-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 44205421 - 2¹¹ = 44203373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 44205392 and 44205401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44205431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104791 + ... + 105211.

It is an arithmetic number, because the mean of its divisors is an integer number (3070683).

Almost surely, 2^44205421 is an apocalyptic number.

44205421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

44205421 is a deficient number, since it is larger than the sum of its proper divisors (4925507).

44205421 is a wasteful number, since it uses less digits than its factorization.

44205421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 44205421 is about 6648.7157406525. The cubic root of 44205421 is about 353.5833805182.

Adding to 44205421 its reverse (12450244), we get a palindrome (56655665).

The spelling of 44205421 in words is "forty-four million, two hundred five thousand, four hundred twenty-one".