44551221 has 32 divisors (see below), whose sum is σ = 72213120. Its totient is φ = 24057600.

The previous prime is 44551211. The next prime is 44551229. The reversal of 44551221 is 12215544.

It is not a de Polignac number, because 44551221 - 2⁷ = 44551093 is a prime.

It is a super-2 number, since 2×44551221² = 3969622585181682, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 44551191 and 44551200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44551229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10651 + ... + 14231.

It is an arithmetic number, because the mean of its divisors is an integer number (2256660).

Almost surely, 2^44551221 is an apocalyptic number.

It is an amenable number.

44551221 is a deficient number, since it is larger than the sum of its proper divisors (27661899).

44551221 is a wasteful number, since it uses less digits than its factorization.

44551221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3637.

The product of its digits is 1600, while the sum is 24.

The square root of 44551221 is about 6674.6701042074. The cubic root of 44551221 is about 354.5029637501.

Adding to 44551221 its reverse (12215544), we get a palindrome (56766765).

The spelling of 44551221 in words is "forty-four million, five hundred fifty-one thousand, two hundred twenty-one".