243105211231 has 24 divisors (see below), whose sum is σ = 262195696224. Its totient is φ = 224623365120.

The previous prime is 243105211211. The next prime is 243105211253. The reversal of 243105211231 is 132112501342.

It is not a de Polignac number, because 243105211231 - 2⁵ = 243105211199 is a prime.

It is a super-2 number, since 2×243105211231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243105211196 and 243105211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243105211211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52132606 + ... + 52137268.

It is an arithmetic number, because the mean of its divisors is an integer number (10924820676).

Almost surely, 2^243105211231 is an apocalyptic number.

243105211231 is a deficient number, since it is larger than the sum of its proper divisors (19090484993).

243105211231 is an equidigital number, since it uses as much as digits as its factorization.

243105211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5679 (or 5620 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 243105211231 its reverse (132112501342), we get a palindrome (375217712573).

The spelling of 243105211231 in words is "two hundred forty-three billion, one hundred five million, two hundred eleven thousand, two hundred thirty-one".