23515500 has 96 divisors (see below), whose sum is σ = 69870528. Its totient is φ = 6144000.

The previous prime is 23515489. The next prime is 23515507. The reversal of 23515500 is 551532.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23515507) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 91372 + ... + 91628.

It is an arithmetic number, because the mean of its divisors is an integer number (727818).

Almost surely, 2^23515500 is an apocalyptic number.

23515500 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 23515500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34935264).

23515500 is an abundant number, since it is smaller than the sum of its proper divisors (46355028).

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

23515500 is a wasteful number, since it uses less digits than its factorization.

23515500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 23515500 is about 4849.2782968190. The cubic root of 23515500 is about 286.4956765274.

The spelling of 23515500 in words is "twenty-three million, five hundred fifteen thousand, five hundred".