22057949 has 2 divisors, whose sum is σ = 22057950. Its totient is φ = 22057948.

The previous prime is 22057933. The next prime is 22057961. The reversal of 22057949 is 94975022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16345849 + 5712100 = 4043^2 + 2390^2 .

It is a cyclic number.

It is not a de Polignac number, because 22057949 - 2⁴ = 22057933 is a prime.

It is a super-2 number, since 2×22057949² = 973106228173202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22057969) 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, 11028974 + 11028975.

It is an arithmetic number, because the mean of its divisors is an integer number (11028975).

Almost surely, 2^22057949 is an apocalyptic number.

It is an amenable number.

22057949 is a deficient number, since it is larger than the sum of its proper divisors (1).

22057949 is an equidigital number, since it uses as much as digits as its factorization.

22057949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 22057949 is about 4696.5890814505. The cubic root of 22057949 is about 280.4497406676.

The spelling of 22057949 in words is "twenty-two million, fifty-seven thousand, nine hundred forty-nine".