16222649 has 2 divisors, whose sum is σ = 16222650. Its totient is φ = 16222648.

The previous prime is 16222639. The next prime is 16222651. The reversal of 16222649 is 94622261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13875625 + 2347024 = 3725^2 + 1532^2 .

It is a cyclic number.

It is not a de Polignac number, because 16222649 - 2²⁰ = 15174073 is a prime.

Together with 16222651, 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 (16222639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8111324 + 8111325.

It is an arithmetic number, because the mean of its divisors is an integer number (8111325).

Almost surely, 2^16222649 is an apocalyptic number.

It is an amenable number.

16222649 is a deficient number, since it is larger than the sum of its proper divisors (1).

16222649 is an equidigital number, since it uses as much as digits as its factorization.

16222649 is an odious number, because the sum of its binary digits is odd.

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

The square root of 16222649 is about 4027.7349714200. The cubic root of 16222649 is about 253.1476638550.

The spelling of 16222649 in words is "sixteen million, two hundred twenty-two thousand, six hundred forty-nine".