2444332221 has 40 divisors (see below), whose sum is σ = 3758441984. Its totient is φ = 1581988320.

The previous prime is 2444332211. The next prime is 2444332249. The reversal of 2444332221 is 1222334442.

2444332221 is a `hidden beast` number, since 2 + 4 + 4 + 433 + 2 + 221 = 666.

2444332221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2444332221 - 2²⁷ = 2310114493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2444332211) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2466036 + ... + 2467026.

Almost surely, 2^2444332221 is an apocalyptic number.

It is an amenable number.

2444332221 is a deficient number, since it is larger than the sum of its proper divisors (1314109763).

2444332221 is an equidigital number, since it uses as much as digits as its factorization.

2444332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863 (or 1854 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 2444332221 is about 49440.1883188161. The cubic root of 2444332221 is about 1347.0593919279.

Adding to 2444332221 its reverse (1222334442), we get a palindrome (3666666663).

The spelling of 2444332221 in words is "two billion, four hundred forty-four million, three hundred thirty-two thousand, two hundred twenty-one".