23155531111 has 16 divisors (see below), whose sum is σ = 24013843200. Its totient is φ = 22316358400.

The previous prime is 23155531109. The next prime is 23155531121. The reversal of 23155531111 is 11113555132.

It is a cyclic number.

It is not a de Polignac number, because 23155531111 - 2¹ = 23155531109 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 23155531111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23155531121) 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 15 ways as a sum of consecutive naturals, for example, 734391 + ... + 765271.

It is an arithmetic number, because the mean of its divisors is an integer number (1500865200).

Almost surely, 2^23155531111 is an apocalyptic number.

23155531111 is a deficient number, since it is larger than the sum of its proper divisors (858312089).

23155531111 is a wasteful number, since it uses less digits than its factorization.

23155531111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31190.

The product of its digits is 2250, while the sum is 28.

The spelling of 23155531111 in words is "twenty-three billion, one hundred fifty-five million, five hundred thirty-one thousand, one hundred eleven".