23005500 has 144 divisors (see below), whose sum is σ = 78178464. Its totient is φ = 5241600.

The previous prime is 23005429. The next prime is 23005517. The reversal of 23005500 is 550032.

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 23005500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73344 + ... + 73656.

It is an arithmetic number, because the mean of its divisors is an integer number (542906).

Almost surely, 2^23005500 is an apocalyptic number.

23005500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23005500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39089232).

23005500 is an abundant number, since it is smaller than the sum of its proper divisors (55172964).

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

23005500 is a wasteful number, since it uses less digits than its factorization.

23005500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 15.

The square root of 23005500 is about 4796.4049036753. The cubic root of 23005500 is about 284.4093646834.

Adding to 23005500 its reverse (550032), we get a palindrome (23555532).

The spelling of 23005500 in words is "twenty-three million, five thousand, five hundred".