22261716 has 72 divisors (see below), whose sum is σ = 60030880. Its totient is φ = 7208352.

The previous prime is 22261709. The next prime is 22261717. The reversal of 22261716 is 61716222.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 22261716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22261717) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35655 + ... + 36273.

Almost surely, 2^22261716 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 22261716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30015440).

22261716 is an abundant number, since it is smaller than the sum of its proper divisors (37769164).

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

22261716 is a wasteful number, since it uses less digits than its factorization.

22261716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675 (or 661 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 22261716 is about 4718.2322961041. The cubic root of 22261716 is about 281.3106749095.

Adding to 22261716 its reverse (61716222), we get a palindrome (83977938).

The spelling of 22261716 in words is "twenty-two million, two hundred sixty-one thousand, seven hundred sixteen".