44232721 has 4 divisors (see below), whose sum is σ = 47635252. Its totient is φ = 40830192.

The previous prime is 44232707. The next prime is 44232731. The reversal of 44232721 is 12723244.

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 9834496 + 34398225 = 3136^2 + 5865^2 .

It is not a de Polignac number, because 44232721 - 2⁵ = 44232689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44232731) 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, 1701246 + ... + 1701271.

It is an arithmetic number, because the mean of its divisors is an integer number (11908813).

Almost surely, 2^44232721 is an apocalyptic number.

It is an amenable number.

44232721 is a deficient number, since it is larger than the sum of its proper divisors (3402531).

44232721 is a wasteful number, since it uses less digits than its factorization.

44232721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3402530.

The product of its digits is 2688, while the sum is 25.

The square root of 44232721 is about 6650.7684518407. The cubic root of 44232721 is about 353.6561531907.

Adding to 44232721 its reverse (12723244), we get a palindrome (56955965).

The spelling of 44232721 in words is "forty-four million, two hundred thirty-two thousand, seven hundred twenty-one".