23115521112 has 64 divisors (see below), whose sum is σ = 61269372000. Its totient is φ = 7242301440.

The previous prime is 23115521089. The next prime is 23115521123. The reversal of 23115521112 is 21112551132.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273264 + ... + 347712.

Almost surely, 2^23115521112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23115521112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30634686000).

23115521112 is an abundant number, since it is smaller than the sum of its proper divisors (38153850888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23115521112 is a wasteful number, since it uses less digits than its factorization.

23115521112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75236 (or 75232 counting only the distinct ones).

The product of its digits is 600, while the sum is 24.

The spelling of 23115521112 in words is "twenty-three billion, one hundred fifteen million, five hundred twenty-one thousand, one hundred twelve".