2443432421 has 4 divisors (see below), whose sum is σ = 2476904172. Its totient is φ = 2409960672.

The previous prime is 2443432403. The next prime is 2443432441. The reversal of 2443432421 is 1242343442.

2443432421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1677803521 + 765628900 = 40961^2 + 27670^2 .

It is a cyclic number.

It is not a de Polignac number, because 2443432421 - 2¹⁴ = 2443416037 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 (2443432441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16735766 + ... + 16735911.

It is an arithmetic number, because the mean of its divisors is an integer number (619226043).

Almost surely, 2^2443432421 is an apocalyptic number.

It is an amenable number.

2443432421 is a deficient number, since it is larger than the sum of its proper divisors (33471751).

2443432421 is an equidigital number, since it uses as much as digits as its factorization.

2443432421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33471750.

The product of its digits is 18432, while the sum is 29.

The square root of 2443432421 is about 49431.0875967746. The cubic root of 2443432421 is about 1346.8940798657.

Adding to 2443432421 its reverse (1242343442), we get a palindrome (3685775863).

The spelling of 2443432421 in words is "two billion, four hundred forty-three million, four hundred thirty-two thousand, four hundred twenty-one".