22641251 has 2 divisors, whose sum is σ = 22641252. Its totient is φ = 22641250.

The previous prime is 22641247. The next prime is 22641259. The reversal of 22641251 is 15214622.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22641251 - 2² = 22641247 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22641259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11320625 + 11320626.

It is an arithmetic number, because the mean of its divisors is an integer number (11320626).

Almost surely, 2^22641251 is an apocalyptic number.

22641251 is a deficient number, since it is larger than the sum of its proper divisors (1).

22641251 is an equidigital number, since it uses as much as digits as its factorization.

22641251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 23.

The square root of 22641251 is about 4758.2823581624. The cubic root of 22641251 is about 282.9003424067.

Adding to 22641251 its reverse (15214622), we get a palindrome (37855873).

The spelling of 22641251 in words is "twenty-two million, six hundred forty-one thousand, two hundred fifty-one".