22235921 has 2 divisors, whose sum is σ = 22235922. Its totient is φ = 22235920.

The previous prime is 22235887. The next prime is 22235929. The reversal of 22235921 is 12953222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21752896 + 483025 = 4664^2 + 695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22235921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22235929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11117960 + 11117961.

It is an arithmetic number, because the mean of its divisors is an integer number (11117961).

Almost surely, 2^22235921 is an apocalyptic number.

It is an amenable number.

22235921 is a deficient number, since it is larger than the sum of its proper divisors (1).

22235921 is an equidigital number, since it uses as much as digits as its factorization.

22235921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 22235921 is about 4715.4979588586. The cubic root of 22235921 is about 281.2019798839.

The spelling of 22235921 in words is "twenty-two million, two hundred thirty-five thousand, nine hundred twenty-one".