4432320421 has 2 divisors, whose sum is σ = 4432320422. Its totient is φ = 4432320420.

The previous prime is 4432320401. The next prime is 4432320439. The reversal of 4432320421 is 1240232344.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4424112196 + 8208225 = 66514^2 + 2865^2 .

It is a cyclic number.

It is not a de Polignac number, because 4432320421 - 2¹⁹ = 4431796133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4432320401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2216160210 + 2216160211.

It is an arithmetic number, because the mean of its divisors is an integer number (2216160211).

Almost surely, 2^4432320421 is an apocalyptic number.

It is an amenable number.

4432320421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4432320421 is an equidigital number, since it uses as much as digits as its factorization.

4432320421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 4432320421 is about 66575.6743938805. The cubic root of 4432320421 is about 1642.6450007477.

Adding to 4432320421 its reverse (1240232344), we get a palindrome (5672552765).

The spelling of 4432320421 in words is "four billion, four hundred thirty-two million, three hundred twenty thousand, four hundred twenty-one".