11722216 has 32 divisors (see below), whose sum is σ = 24756480. Its totient is φ = 5155200.

The previous prime is 11722201. The next prime is 11722283. The reversal of 11722216 is 61222711.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 580 + ... + 4876.

It is an arithmetic number, because the mean of its divisors is an integer number (773640).

Almost surely, 2^11722216 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 11722216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12378240).

11722216 is an abundant number, since it is smaller than the sum of its proper divisors (13034264).

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

11722216 is a wasteful number, since it uses less digits than its factorization.

11722216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4345 (or 4341 counting only the distinct ones).

The product of its digits is 336, while the sum is 22.

The square root of 11722216 is about 3423.7721886831. The cubic root of 11722216 is about 227.1624652832.

Multiplying 11722216 by its sum of digits (22), we get a palindrome (257888752).

Adding to 11722216 its reverse (61222711), we get a palindrome (72944927).

It can be divided in two parts, 11 and 722216, that added together give a palindrome (722227).

The spelling of 11722216 in words is "eleven million, seven hundred twenty-two thousand, two hundred sixteen".