23211216 has 60 divisors (see below), whose sum is σ = 74242272. Its totient is φ = 6631488.

The previous prime is 23211169. The next prime is 23211229. The reversal of 23211216 is 61211232.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10506 + ... + 12521.

Almost surely, 2^23211216 is an apocalyptic number.

It is an amenable number.

23211216 is an abundant number, since it is smaller than the sum of its proper divisors (51031056).

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

23211216 is a wasteful number, since it uses less digits than its factorization.

23211216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23048 (or 23039 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 23211216 is about 4817.8019884591. The cubic root of 23211216 is about 285.2545832306.

Adding to 23211216 its reverse (61211232), we get a palindrome (84422448).

The spelling of 23211216 in words is "twenty-three million, two hundred eleven thousand, two hundred sixteen".