23513212543 has 2 divisors, whose sum is σ = 23513212544. Its totient is φ = 23513212542.

The previous prime is 23513212531. The next prime is 23513212559. The reversal of 23513212543 is 34521231532.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23513212543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23513212523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11756606271 + 11756606272.

It is an arithmetic number, because the mean of its divisors is an integer number (11756606272).

Almost surely, 2^23513212543 is an apocalyptic number.

23513212543 is a deficient number, since it is larger than the sum of its proper divisors (1).

23513212543 is an equidigital number, since it uses as much as digits as its factorization.

23513212543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 31.

The spelling of 23513212543 in words is "twenty-three billion, five hundred thirteen million, two hundred twelve thousand, five hundred forty-three".