44220413 has 4 divisors (see below), whose sum is σ = 44268348. Its totient is φ = 44172480.

The previous prime is 44220409. The next prime is 44220437. The reversal of 44220413 is 31402244.

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 12264004 + 31956409 = 3502^2 + 5653^2 .

It is a cyclic number.

It is not a de Polignac number, because 44220413 - 2² = 44220409 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 (44220443) 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, 22556 + ... + 24437.

It is an arithmetic number, because the mean of its divisors is an integer number (11067087).

Almost surely, 2^44220413 is an apocalyptic number.

It is an amenable number.

44220413 is a deficient number, since it is larger than the sum of its proper divisors (47935).

44220413 is an equidigital number, since it uses as much as digits as its factorization.

44220413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47934.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 44220413 is about 6649.8430808554. The cubic root of 44220413 is about 353.6233478855.

Adding to 44220413 its reverse (31402244), we get a palindrome (75622657).

The spelling of 44220413 in words is "forty-four million, two hundred twenty thousand, four hundred thirteen".