243443132203321 has 4 divisors (see below), whose sum is σ = 243448072551972. Its totient is φ = 243438191854672.

The previous prime is 243443132203319. The next prime is 243443132203331. The reversal of 243443132203321 is 123302231344342.

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 134806287793321 + 108636844410000 = 11610611^2 + 10422900^2 .

It is a cyclic number.

It is not a de Polignac number, because 243443132203321 - 2¹ = 243443132203319 is a prime.

It is a super-2 number, since 2×243443132203321² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243443132203331) 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, 2470100410 + ... + 2470198963.

It is an arithmetic number, because the mean of its divisors is an integer number (60862018137993).

Almost surely, 2^{243443132203321} is an apocalyptic number.

It is an amenable number.

243443132203321 is a deficient number, since it is larger than the sum of its proper divisors (4940348651).

243443132203321 is an equidigital number, since it uses as much as digits as its factorization.

243443132203321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940348650.

The product of its (nonzero) digits is 248832, while the sum is 37.

Adding to 243443132203321 its reverse (123302231344342), we get a palindrome (366745363547663).

The spelling of 243443132203321 in words is "two hundred forty-three trillion, four hundred forty-three billion, one hundred thirty-two million, two hundred three thousand, three hundred twenty-one".