22298921 has 2 divisors, whose sum is σ = 22298922. Its totient is φ = 22298920.

The previous prime is 22298851. The next prime is 22298923. The reversal of 22298921 is 12989222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18835600 + 3463321 = 4340^2 + 1861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22298921 is a prime.

Together with 22298923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22298923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11149460 + 11149461.

It is an arithmetic number, because the mean of its divisors is an integer number (11149461).

Almost surely, 2^22298921 is an apocalyptic number.

It is an amenable number.

22298921 is a deficient number, since it is larger than the sum of its proper divisors (1).

22298921 is an equidigital number, since it uses as much as digits as its factorization.

22298921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 22298921 is about 4722.1733343875. The cubic root of 22298921 is about 281.4673016272.

The spelling of 22298921 in words is "twenty-two million, two hundred ninety-eight thousand, nine hundred twenty-one".