23109216 has 48 divisors (see below), whose sum is σ = 65331504. Its totient is φ = 7110144.

The previous prime is 23109211. The next prime is 23109217. The reversal of 23109216 is 61290132.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23109211) 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, 8011 + ... + 10506.

It is an arithmetic number, because the mean of its divisors is an integer number (1361073).

Almost surely, 2^23109216 is an apocalyptic number.

23109216 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

23109216 is an abundant number, since it is smaller than the sum of its proper divisors (42222288).

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

23109216 is a wasteful number, since it uses less digits than its factorization.

23109216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18543 (or 18535 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 23109216 is about 4807.2045931081. The cubic root of 23109216 is about 284.8361261668.

Adding to 23109216 its reverse (61290132), we get a palindrome (84399348).

The spelling of 23109216 in words is "twenty-three million, one hundred nine thousand, two hundred sixteen".