7421332321 has 6 divisors (see below), whose sum is σ = 8036117430. Its totient is φ = 6850460448.

The previous prime is 7421332309. The next prime is 7421332343. The reversal of 7421332321 is 1232331247.

It can be written as a sum of positive squares in 3 ways, for example, as 691427025 + 6729905296 = 26295^2 + 82036^2 .

It is not a de Polignac number, because 7421332321 - 2³¹ = 5273848673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7421332321.

It is not an unprimeable number, because it can be changed into a prime (7421332361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21956436 + ... + 21956773.

It is an arithmetic number, because the mean of its divisors is an integer number (1339352905).

Almost surely, 2^7421332321 is an apocalyptic number.

It is an amenable number.

7421332321 is a deficient number, since it is larger than the sum of its proper divisors (614785109).

7421332321 is a wasteful number, since it uses less digits than its factorization.

7421332321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43913235 (or 43913222 counting only the distinct ones).

The product of its digits is 6048, while the sum is 28.

The square root of 7421332321 is about 86147.1550371804. The cubic root of 7421332321 is about 1950.5658950192.

Adding to 7421332321 its reverse (1232331247), we get a palindrome (8653663568).

The spelling of 7421332321 in words is "seven billion, four hundred twenty-one million, three hundred thirty-two thousand, three hundred twenty-one".