22858921 has 2 divisors, whose sum is σ = 22858922. Its totient is φ = 22858920.

The previous prime is 22858907. The next prime is 22858937. The reversal of 22858921 is 12985822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19900521 + 2958400 = 4461^2 + 1720^2 .

It is a cyclic number.

It is not a de Polignac number, because 22858921 - 2⁵ = 22858889 is a prime.

It is not a weakly prime, because it can be changed into another prime (22858951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11429460 + 11429461.

It is an arithmetic number, because the mean of its divisors is an integer number (11429461).

Almost surely, 2^22858921 is an apocalyptic number.

It is an amenable number.

22858921 is a deficient number, since it is larger than the sum of its proper divisors (1).

22858921 is an equidigital number, since it uses as much as digits as its factorization.

22858921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 37.

The square root of 22858921 is about 4781.1003963523. The cubic root of 22858921 is about 283.8040414060.

The spelling of 22858921 in words is "twenty-two million, eight hundred fifty-eight thousand, nine hundred twenty-one".