44421413 has 4 divisors (see below), whose sum is σ = 44920620. Its totient is φ = 43922208.

The previous prime is 44421407. The next prime is 44421457. The reversal of 44421413 is 31412444.

It is a happy number.

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 3678724 + 40742689 = 1918^2 + 6383^2 .

It is a cyclic number.

It is not a de Polignac number, because 44421413 - 2⁴ = 44421397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44421613) 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, 249470 + ... + 249647.

It is an arithmetic number, because the mean of its divisors is an integer number (11230155).

Almost surely, 2^44421413 is an apocalyptic number.

It is an amenable number.

44421413 is a deficient number, since it is larger than the sum of its proper divisors (499207).

44421413 is an equidigital number, since it uses as much as digits as its factorization.

44421413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499206.

The product of its digits is 1536, while the sum is 23.

The square root of 44421413 is about 6664.9390844928. The cubic root of 44421413 is about 354.1583260842.

Adding to 44421413 its reverse (31412444), we get a palindrome (75833857).

The spelling of 44421413 in words is "forty-four million, four hundred twenty-one thousand, four hundred thirteen".