4421221522 has 16 divisors (see below), whose sum is σ = 6871495680. Its totient is φ = 2132137072.

The previous prime is 4421221499. The next prime is 4421221523. The reversal of 4421221522 is 2251221244.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (4421221523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347218 + ... + 359725.

It is an arithmetic number, because the mean of its divisors is an integer number (429468480).

Almost surely, 2^4421221522 is an apocalyptic number.

4421221522 is a deficient number, since it is larger than the sum of its proper divisors (2450274158).

4421221522 is a wasteful number, since it uses less digits than its factorization.

4421221522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707057.

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

The square root of 4421221522 is about 66492.2666330454. The cubic root of 4421221522 is about 1641.2727481274.

Adding to 4421221522 its reverse (2251221244), we get a palindrome (6672442766).

The spelling of 4421221522 in words is "four billion, four hundred twenty-one million, two hundred twenty-one thousand, five hundred twenty-two".