23543420231 has 2 divisors, whose sum is σ = 23543420232. Its totient is φ = 23543420230.

The previous prime is 23543420221. The next prime is 23543420273. The reversal of 23543420231 is 13202434532.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23543420231 is a prime.

It is a super-3 number, since 3×23543420231³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 23543420194 and 23543420203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23543420221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11771710115 + 11771710116.

It is an arithmetic number, because the mean of its divisors is an integer number (11771710116).

Almost surely, 2^23543420231 is an apocalyptic number.

23543420231 is a deficient number, since it is larger than the sum of its proper divisors (1).

23543420231 is an equidigital number, since it uses as much as digits as its factorization.

23543420231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 23543420231 its reverse (13202434532), we get a palindrome (36745854763).

The spelling of 23543420231 in words is "twenty-three billion, five hundred forty-three million, four hundred twenty thousand, two hundred thirty-one".