2222144521 has 8 divisors (see below), whose sum is σ = 2239771464. Its totient is φ = 2204538240.

The previous prime is 2222144503. The next prime is 2222144549. The reversal of 2222144521 is 1254412222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 619263225 + 1602881296 = 24885^2 + 40036^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2222144521 - 2¹⁷ = 2222013449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2222144591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266191 + ... + 274411.

It is an arithmetic number, because the mean of its divisors is an integer number (279971433).

Almost surely, 2^2222144521 is an apocalyptic number.

It is an amenable number.

2222144521 is a deficient number, since it is larger than the sum of its proper divisors (17626943).

2222144521 is a wasteful number, since it uses less digits than its factorization.

2222144521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10331.

The product of its digits is 2560, while the sum is 25.

The square root of 2222144521 is about 47139.6279259818. The cubic root of 2222144521 is about 1304.9406707123.

Adding to 2222144521 its reverse (1254412222), we get a palindrome (3476556743).

The spelling of 2222144521 in words is "two billion, two hundred twenty-two million, one hundred forty-four thousand, five hundred twenty-one".