243111213005 has 16 divisors (see below), whose sum is σ = 294789183024. Its totient is φ = 192452474880.

The previous prime is 243111212963. The next prime is 243111213041. The reversal of 243111213005 is 500312111342.

It can be written as a sum of positive squares in 8 ways, for example, as 18280662436 + 224830550569 = 135206^2 + 474163^2 .

It is not a de Polignac number, because 243111213005 - 2⁶ = 243111212941 is a prime.

It is a super-2 number, since 2×243111213005² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3192959 + ... + 3268211.

It is an arithmetic number, because the mean of its divisors is an integer number (18424323939).

Almost surely, 2^243111213005 is an apocalyptic number.

It is an amenable number.

243111213005 is a deficient number, since it is larger than the sum of its proper divisors (51677970019).

243111213005 is an equidigital number, since it uses as much as digits as its factorization.

243111213005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82016.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 243111213005 its reverse (500312111342), we get a palindrome (743423324347).

The spelling of 243111213005 in words is "two hundred forty-three billion, one hundred eleven million, two hundred thirteen thousand, five".