23091216 has 20 divisors (see below), whose sum is σ = 59652432. Its totient is φ = 7697056.

The previous prime is 23091209. The next prime is 23091217. The reversal of 23091216 is 61219032.

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

It is not an unprimeable number, because it can be changed into a prime (23091217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240486 + ... + 240581.

Almost surely, 2^23091216 is an apocalyptic number.

It is an amenable number.

23091216 is an abundant number, since it is smaller than the sum of its proper divisors (36561216).

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

23091216 is a wasteful number, since it uses less digits than its factorization.

23091216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481078 (or 481072 counting only the distinct ones).

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

The square root of 23091216 is about 4805.3320384756. The cubic root of 23091216 is about 284.7621530527.

The spelling of 23091216 in words is "twenty-three million, ninety-one thousand, two hundred sixteen".