23216560 has 80 divisors (see below), whose sum is σ = 58630176. Its totient is φ = 8515584.

The previous prime is 23216483. The next prime is 23216561. The reversal of 23216560 is 6561232.

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

It is not an unprimeable number, because it can be changed into a prime (23216561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58282 + ... + 58678.

Almost surely, 2^23216560 is an apocalyptic number.

23216560 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 23216560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29315088).

23216560 is an abundant number, since it is smaller than the sum of its proper divisors (35413616).

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

23216560 is a wasteful number, since it uses less digits than its factorization.

23216560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 23216560 is about 4818.3565662993. The cubic root of 23216560 is about 285.2764732731.

Adding to 23216560 its reverse (6561232), we get a palindrome (29777792).

The spelling of 23216560 in words is "twenty-three million, two hundred sixteen thousand, five hundred sixty".