44021641 has 4 divisors (see below), whose sum is σ = 44852292. Its totient is φ = 43190992.

The previous prime is 44021639. The next prime is 44021693. The reversal of 44021641 is 14612044.

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 40005625 + 4016016 = 6325^2 + 2004^2 .

It is a cyclic number.

It is not a de Polignac number, because 44021641 - 2¹ = 44021639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44021441) 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, 415246 + ... + 415351.

It is an arithmetic number, because the mean of its divisors is an integer number (11213073).

Almost surely, 2^44021641 is an apocalyptic number.

It is an amenable number.

44021641 is a deficient number, since it is larger than the sum of its proper divisors (830651).

44021641 is an equidigital number, since it uses as much as digits as its factorization.

44021641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830650.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 44021641 is about 6634.8806319330. The cubic root of 44021641 is about 353.0927030373.

Adding to 44021641 its reverse (14612044), we get a palindrome (58633685).

The spelling of 44021641 in words is "forty-four million, twenty-one thousand, six hundred forty-one".