243132213241 has 4 divisors (see below), whose sum is σ = 243135259812. Its totient is φ = 243129166672.

The previous prime is 243132213161. The next prime is 243132213257. The reversal of 243132213241 is 142312231342.

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 44219781225 + 198912432016 = 210285^2 + 445996^2 .

It is a cyclic number.

It is not a de Polignac number, because 243132213241 - 2¹⁷ = 243132082169 is a prime.

It is a super-2 number, since 2×243132213241² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243132213271) 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, 1400266 + ... + 1564291.

It is an arithmetic number, because the mean of its divisors is an integer number (60783814953).

Almost surely, 2^243132213241 is an apocalyptic number.

It is an amenable number.

243132213241 is a deficient number, since it is larger than the sum of its proper divisors (3046571).

243132213241 is an equidigital number, since it uses as much as digits as its factorization.

243132213241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046570.

The product of its digits is 6912, while the sum is 28.

Adding to 243132213241 its reverse (142312231342), we get a palindrome (385444444583).

The spelling of 243132213241 in words is "two hundred forty-three billion, one hundred thirty-two million, two hundred thirteen thousand, two hundred forty-one".