23111105651 has 4 divisors (see below), whose sum is σ = 24470582472. Its totient is φ = 21751628832.

The previous prime is 23111105627. The next prime is 23111105653. The reversal of 23111105651 is 15650111132.

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-23111105651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23111105651.

It is not an unprimeable number, because it can be changed into a prime (23111105653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 679738385 + ... + 679738418.

It is an arithmetic number, because the mean of its divisors is an integer number (6117645618).

Almost surely, 2^23111105651 is an apocalyptic number.

23111105651 is a deficient number, since it is larger than the sum of its proper divisors (1359476821).

23111105651 is a wasteful number, since it uses less digits than its factorization.

23111105651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359476820.

The product of its (nonzero) digits is 900, while the sum is 26.

Adding to 23111105651 its reverse (15650111132), we get a palindrome (38761216783).

The spelling of 23111105651 in words is "twenty-three billion, one hundred eleven million, one hundred five thousand, six hundred fifty-one".