22115772 has 144 divisors (see below), whose sum is σ = 69888000. Its totient is φ = 5754240.

The previous prime is 22115771. The next prime is 22115783. The reversal of 22115772 is 27751122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22115771) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 148354 + ... + 148502.

Almost surely, 2^22115772 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 22115772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34944000).

22115772 is an abundant number, since it is smaller than the sum of its proper divisors (47772228).

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

22115772 is a wasteful number, since it uses less digits than its factorization.

22115772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 211 counting only the distinct ones).

The product of its digits is 1960, while the sum is 27.

The square root of 22115772 is about 4702.7409029203. The cubic root of 22115772 is about 280.6945850690.

Adding to 22115772 its reverse (27751122), we get a palindrome (49866894).

The spelling of 22115772 in words is "twenty-two million, one hundred fifteen thousand, seven hundred seventy-two".