22128851 has 2 divisors, whose sum is σ = 22128852. Its totient is φ = 22128850.

The previous prime is 22128839. The next prime is 22128859. The reversal of 22128851 is 15882122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22128851 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22128859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11064425 + 11064426.

It is an arithmetic number, because the mean of its divisors is an integer number (11064426).

Almost surely, 2^22128851 is an apocalyptic number.

22128851 is a deficient number, since it is larger than the sum of its proper divisors (1).

22128851 is an equidigital number, since it uses as much as digits as its factorization.

22128851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2560, while the sum is 29.

The square root of 22128851 is about 4704.1312694269. The cubic root of 22128851 is about 280.7499072920.

The spelling of 22128851 in words is "twenty-two million, one hundred twenty-eight thousand, eight hundred fifty-one".