23731216 has 40 divisors (see below), whose sum is σ = 48836160. Its totient is φ = 11147136.

The previous prime is 23731207. The next prime is 23731219. The reversal of 23731216 is 61213732.

It is a super-2 number, since 2×23731216² = 1126341225677312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23731219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21166 + ... + 22258.

It is an arithmetic number, because the mean of its divisors is an integer number (1220904).

Almost surely, 2^23731216 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 23731216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24418080).

23731216 is an abundant number, since it is smaller than the sum of its proper divisors (25104944).

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

23731216 is a wasteful number, since it uses less digits than its factorization.

23731216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183 (or 1177 counting only the distinct ones).

The product of its digits is 1512, while the sum is 25.

The square root of 23731216 is about 4871.4695934595. The cubic root of 23731216 is about 287.3690534108.

Adding to 23731216 its reverse (61213732), we get a palindrome (84944948).

The spelling of 23731216 in words is "twenty-three million, seven hundred thirty-one thousand, two hundred sixteen".