22290449 has 2 divisors, whose sum is σ = 22290450. Its totient is φ = 22290448.

The previous prime is 22290419. The next prime is 22290461. The reversal of 22290449 is 94409222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18318400 + 3972049 = 4280^2 + 1993^2 .

It is a cyclic number.

It is not a de Polignac number, because 22290449 - 2¹² = 22286353 is a prime.

It is not a weakly prime, because it can be changed into another prime (22290409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11145224 + 11145225.

It is an arithmetic number, because the mean of its divisors is an integer number (11145225).

Almost surely, 2^22290449 is an apocalyptic number.

It is an amenable number.

22290449 is a deficient number, since it is larger than the sum of its proper divisors (1).

22290449 is an equidigital number, since it uses as much as digits as its factorization.

22290449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 22290449 is about 4721.2762045871. The cubic root of 22290449 is about 281.4316512769.

The spelling of 22290449 in words is "twenty-two million, two hundred ninety thousand, four hundred forty-nine".