22116251 has 4 divisors (see below), whose sum is σ = 22152600. Its totient is φ = 22079904.

The previous prime is 22116239. The next prime is 22116277. The reversal of 22116251 is 15261122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22116251 - 2⁶ = 22116187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22116751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17246 + ... + 18483.

It is an arithmetic number, because the mean of its divisors is an integer number (5538150).

Almost surely, 2^22116251 is an apocalyptic number.

22116251 is a deficient number, since it is larger than the sum of its proper divisors (36349).

22116251 is an equidigital number, since it uses as much as digits as its factorization.

22116251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36348.

The product of its digits is 240, while the sum is 20.

The square root of 22116251 is about 4702.7918303918. The cubic root of 22116251 is about 280.6966115524.

Adding to 22116251 its reverse (15261122), we get a palindrome (37377373).

The spelling of 22116251 in words is "twenty-two million, one hundred sixteen thousand, two hundred fifty-one".