20243231231 has 2 divisors, whose sum is σ = 20243231232. Its totient is φ = 20243231230.

The previous prime is 20243231213. The next prime is 20243231233. The reversal of 20243231231 is 13213234202.

Together with previous prime (20243231213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20243231231 - 2¹⁰ = 20243230207 is a prime.

It is a super-2 number, since 2×20243231231² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 20243231233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20243231197 and 20243231206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20243231233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10121615615 + 10121615616.

It is an arithmetic number, because the mean of its divisors is an integer number (10121615616).

Almost surely, 2^20243231231 is an apocalyptic number.

20243231231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20243231231 is an equidigital number, since it uses as much as digits as its factorization.

20243231231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20243231231 its reverse (13213234202), we get a palindrome (33456465433).

The spelling of 20243231231 in words is "twenty billion, two hundred forty-three million, two hundred thirty-one thousand, two hundred thirty-one".