23115120 has 80 divisors (see below), whose sum is σ = 81899520. Its totient is φ = 5283072.

The previous prime is 23115109. The next prime is 23115133. The reversal of 23115120 is 2151132.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×23115120² = 1068617545228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 23115120.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5200 + ... + 8559.

It is an arithmetic number, because the mean of its divisors is an integer number (1023744).

Almost surely, 2^23115120 is an apocalyptic number.

23115120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23115120 is an abundant number, since it is smaller than the sum of its proper divisors (58784400).

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

23115120 is a wasteful number, since it uses less digits than its factorization.

23115120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13782 (or 13776 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 23115120 is about 4807.8186321865. The cubic root of 23115120 is about 284.8603809821.

Adding to 23115120 its reverse (2151132), we get a palindrome (25266252).

It can be divided in two parts, 231 and 15120, that added together give a palindrome (15351).

The spelling of 23115120 in words is "twenty-three million, one hundred fifteen thousand, one hundred twenty".