4144454221 has 4 divisors (see below), whose sum is σ = 4172269500. Its totient is φ = 4116638944.

The previous prime is 4144454207. The next prime is 4144454227. The reversal of 4144454221 is 1224544414.

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 155900196 + 3988554025 = 12486^2 + 63155^2 .

It is a cyclic number.

It is not a de Polignac number, because 4144454221 - 2²¹ = 4142357069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4144454227) 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, 13907416 + ... + 13907713.

It is an arithmetic number, because the mean of its divisors is an integer number (1043067375).

Almost surely, 2^4144454221 is an apocalyptic number.

It is an amenable number.

4144454221 is a deficient number, since it is larger than the sum of its proper divisors (27815279).

4144454221 is a wasteful number, since it uses less digits than its factorization.

4144454221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27815278.

The product of its digits is 20480, while the sum is 31.

The square root of 4144454221 is about 64377.4356510105. The cubic root of 4144454221 is about 1606.2844272756.

Adding to 4144454221 its reverse (1224544414), we get a palindrome (5368998635).

The spelling of 4144454221 in words is "four billion, one hundred forty-four million, four hundred fifty-four thousand, two hundred twenty-one".