22116621 has 8 divisors (see below), whose sum is σ = 29545504. Its totient is φ = 14716080.

The previous prime is 22116613. The next prime is 22116637. The reversal of 22116621 is 12661122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22116621 - 2³ = 22116613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22116641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5191 + ... + 8436.

It is an arithmetic number, because the mean of its divisors is an integer number (3693188).

Almost surely, 2^22116621 is an apocalyptic number.

It is an amenable number.

22116621 is a deficient number, since it is larger than the sum of its proper divisors (7428883).

22116621 is a wasteful number, since it uses less digits than its factorization.

22116621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14171.

The product of its digits is 288, while the sum is 21.

The square root of 22116621 is about 4702.8311685622. The cubic root of 22116621 is about 280.6981768745.

Adding to 22116621 its reverse (12661122), we get a palindrome (34777743).

The spelling of 22116621 in words is "twenty-two million, one hundred sixteen thousand, six hundred twenty-one".