22507649 has 2 divisors, whose sum is σ = 22507650. Its totient is φ = 22507648.

The previous prime is 22507637. The next prime is 22507651. The reversal of 22507649 is 94670522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16056049 + 6451600 = 4007^2 + 2540^2 .

It is a cyclic number.

It is not a de Polignac number, because 22507649 - 2¹⁶ = 22442113 is a prime.

Together with 22507651, 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 (22500649) 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, 11253824 + 11253825.

It is an arithmetic number, because the mean of its divisors is an integer number (11253825).

Almost surely, 2^22507649 is an apocalyptic number.

It is an amenable number.

22507649 is a deficient number, since it is larger than the sum of its proper divisors (1).

22507649 is an equidigital number, since it uses as much as digits as its factorization.

22507649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 22507649 is about 4744.2226971339. Note that the first 3 decimals coincide. The cubic root of 22507649 is about 282.3427960824.

The spelling of 22507649 in words is "twenty-two million, five hundred seven thousand, six hundred forty-nine".