7221144424 has 32 divisors (see below), whose sum is σ = 14856284520. Its totient is φ = 3269949696.

The previous prime is 7221144421. The next prime is 7221144457. The reversal of 7221144424 is 4244411227.

It can be written as a sum of positive squares in 4 ways, for example, as 4653695524 + 2567448900 = 68218^2 + 50670^2 .

It is not an unprimeable number, because it can be changed into a prime (7221144421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649527 + ... + 660550.

Almost surely, 2^7221144424 is an apocalyptic number.

It is an amenable number.

7221144424 is an abundant number, since it is smaller than the sum of its proper divisors (7635140096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7221144424 is a wasteful number, since it uses less digits than its factorization.

7221144424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310149 (or 1310145 counting only the distinct ones).

The product of its digits is 14336, while the sum is 31.

The square root of 7221144424 is about 84977.3171146277. The cubic root of 7221144424 is about 1932.8671734072.

The spelling of 7221144424 in words is "seven billion, two hundred twenty-one million, one hundred forty-four thousand, four hundred twenty-four".