243132204145 has 4 divisors (see below), whose sum is σ = 291758644980. Its totient is φ = 194505763312.

The previous prime is 243132204109. The next prime is 243132204149. The reversal of 243132204145 is 541402231342.

243132204145 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 69716593521 + 173415610624 = 264039^2 + 416432^2 .

It is a cyclic number.

It is not a de Polignac number, because 243132204145 - 2⁷ = 243132204017 is a prime.

It is a super-2 number, since 2×243132204145² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243132204149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24313220410 + ... + 24313220419.

It is an arithmetic number, because the mean of its divisors is an integer number (72939661245).

Almost surely, 2^243132204145 is an apocalyptic number.

It is an amenable number.

243132204145 is a deficient number, since it is larger than the sum of its proper divisors (48626440835).

243132204145 is an equidigital number, since it uses as much as digits as its factorization.

243132204145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48626440834.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 243132204145 its reverse (541402231342), we get a palindrome (784534435487).

The spelling of 243132204145 in words is "two hundred forty-three billion, one hundred thirty-two million, two hundred four thousand, one hundred forty-five".