13432430221 has 12 divisors (see below), whose sum is σ = 16164291420. Its totient is φ = 11116492800.

The previous prime is 13432430203. The next prime is 13432430233. The reversal of 13432430221 is 12203423431.

It can be written as a sum of positive squares in 2 ways, for example, as 8697614121 + 4734816100 = 93261^2 + 68810^2 .

It is not a de Polignac number, because 13432430221 - 2¹⁷ = 13432299149 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 (13432430281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4724980 + ... + 4727821.

It is an arithmetic number, because the mean of its divisors is an integer number (1347024285).

Almost surely, 2^13432430221 is an apocalyptic number.

It is an amenable number.

13432430221 is a deficient number, since it is larger than the sum of its proper divisors (2731861199).

13432430221 is an equidigital number, since it uses as much as digits as its factorization.

13432430221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9452844 (or 9452837 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 13432430221 its reverse (12203423431), we get a palindrome (25635853652).

The spelling of 13432430221 in words is "thirteen billion, four hundred thirty-two million, four hundred thirty thousand, two hundred twenty-one".