23561216 has 88 divisors (see below), whose sum is σ = 56988480. Its totient is φ = 9510912.

The previous prime is 23561207. The next prime is 23561231. The reversal of 23561216 is 61216532.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136106 + ... + 136278.

Almost surely, 2^23561216 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 23561216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28494240).

23561216 is an abundant number, since it is smaller than the sum of its proper divisors (33427264).

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

23561216 is a wasteful number, since it uses less digits than its factorization.

23561216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 201 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 23561216 is about 4853.9896992062. The cubic root of 23561216 is about 286.6812131312.

Adding to 23561216 its reverse (61216532), we get a palindrome (84777748).

The spelling of 23561216 in words is "twenty-three million, five hundred sixty-one thousand, two hundred sixteen".