23043251545511 has 4 divisors (see below), whose sum is σ = 23048644306992. Its totient is φ = 23037858784032.

The previous prime is 23043251545463. The next prime is 23043251545513. The reversal of 23043251545511 is 11554515234032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23043251545511 is a prime.

It is a super-2 number, since 2×23043251545511² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23043251545513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2696374331 + ... + 2696382876.

It is an arithmetic number, because the mean of its divisors is an integer number (5762161076748).

Almost surely, 2^{23043251545511} is an apocalyptic number.

23043251545511 is a deficient number, since it is larger than the sum of its proper divisors (5392761481).

23043251545511 is an equidigital number, since it uses as much as digits as its factorization.

23043251545511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5392761480.

The product of its (nonzero) digits is 360000, while the sum is 41.

Adding to 23043251545511 its reverse (11554515234032), we get a palindrome (34597766779543).

The spelling of 23043251545511 in words is "twenty-three trillion, forty-three billion, two hundred fifty-one million, five hundred forty-five thousand, five hundred eleven".