44723221 has 2 divisors, whose sum is σ = 44723222. Its totient is φ = 44723220.

The previous prime is 44723219. The next prime is 44723281. The reversal of 44723221 is 12232744.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25704900 + 19018321 = 5070^2 + 4361^2 .

It is a cyclic number.

It is not a de Polignac number, because 44723221 - 2¹ = 44723219 is a prime.

It is a super-2 number, since 2×44723221² = 4000332993229682, which contains 22 as substring.

Together with 44723219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44723281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22361610 + 22361611.

It is an arithmetic number, because the mean of its divisors is an integer number (22361611).

Almost surely, 2^44723221 is an apocalyptic number.

It is an amenable number.

44723221 is a deficient number, since it is larger than the sum of its proper divisors (1).

44723221 is an equidigital number, since it uses as much as digits as its factorization.

44723221 is an evil number, because the sum of its binary digits is even.

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

The square root of 44723221 is about 6687.5422241658. The cubic root of 44723221 is about 354.9585906867.

Adding to 44723221 its reverse (12232744), we get a palindrome (56955965).

It can be divided in two parts, 44723 and 221, that added together give a palindrome (44944).

The spelling of 44723221 in words is "forty-four million, seven hundred twenty-three thousand, two hundred twenty-one".