44212721 has 8 divisors (see below), whose sum is σ = 51001920. Its totient is φ = 37541808.

The previous prime is 44212717. The next prime is 44212723. The reversal of 44212721 is 12721244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 44212721 - 2² = 44212717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44212723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28766 + ... + 30263.

It is an arithmetic number, because the mean of its divisors is an integer number (6375240).

Almost surely, 2^44212721 is an apocalyptic number.

It is an amenable number.

44212721 is a deficient number, since it is larger than the sum of its proper divisors (6789199).

44212721 is a wasteful number, since it uses less digits than its factorization.

44212721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59143.

The product of its digits is 896, while the sum is 23.

The square root of 44212721 is about 6649.2646961901. The cubic root of 44212721 is about 353.6028428115.

Adding to 44212721 its reverse (12721244), we get a palindrome (56933965).

The spelling of 44212721 in words is "forty-four million, two hundred twelve thousand, seven hundred twenty-one".