23215055111 has 4 divisors (see below), whose sum is σ = 23370861000. Its totient is φ = 23059249224.

The previous prime is 23215055063. The next prime is 23215055153. The reversal of 23215055111 is 11155051232.

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

It is a cyclic number.

It is not a de Polignac number, because 23215055111 - 2¹⁸ = 23214792967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23215055191) 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, 77902721 + ... + 77903018.

It is an arithmetic number, because the mean of its divisors is an integer number (5842715250).

Almost surely, 2^23215055111 is an apocalyptic number.

23215055111 is a deficient number, since it is larger than the sum of its proper divisors (155805889).

23215055111 is a wasteful number, since it uses less digits than its factorization.

23215055111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155805888.

The product of its (nonzero) digits is 1500, while the sum is 26.

The spelling of 23215055111 in words is "twenty-three billion, two hundred fifteen million, fifty-five thousand, one hundred eleven".