243312211331 has 16 divisors (see below), whose sum is σ = 290513869824. Its totient is φ = 199243291104.

The previous prime is 243312211271. The next prime is 243312211349. The reversal of 243312211331 is 133112213342.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 243312211331 - 2²⁶ = 243245102467 is a prime.

It is a super-2 number, since 2×243312211331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243312211331.

It is not an unprimeable number, because it can be changed into a prime (243312211531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 785636 + ... + 1050641.

It is an arithmetic number, because the mean of its divisors is an integer number (18157116864).

Almost surely, 2^243312211331 is an apocalyptic number.

243312211331 is a deficient number, since it is larger than the sum of its proper divisors (47201658493).

243312211331 is a wasteful number, since it uses less digits than its factorization.

243312211331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837130.

The product of its digits is 2592, while the sum is 26.

Adding to 243312211331 its reverse (133112213342), we get a palindrome (376424424673).

The spelling of 243312211331 in words is "two hundred forty-three billion, three hundred twelve million, two hundred eleven thousand, three hundred thirty-one".