44213021 has 4 divisors (see below), whose sum is σ = 44745792. Its totient is φ = 43680252.

The previous prime is 44213009. The next prime is 44213027. The reversal of 44213021 is 12031244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 44213021 - 2¹⁰ = 44211997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44213027) 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, 266261 + ... + 266426.

It is an arithmetic number, because the mean of its divisors is an integer number (11186448).

Almost surely, 2^44213021 is an apocalyptic number.

It is an amenable number.

44213021 is a deficient number, since it is larger than the sum of its proper divisors (532771).

44213021 is an equidigital number, since it uses as much as digits as its factorization.

44213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532770.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 44213021 is about 6649.2872550372. The cubic root of 44213021 is about 353.6036425860.

Adding to 44213021 its reverse (12031244), we get a palindrome (56244265).

The spelling of 44213021 in words is "forty-four million, two hundred thirteen thousand, twenty-one".