16622257 has 2 divisors, whose sum is σ = 16622258. Its totient is φ = 16622256.

The previous prime is 16622237. The next prime is 16622297. The reversal of 16622257 is 75222661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13660416 + 2961841 = 3696^2 + 1721^2 .

It is a cyclic number.

It is not a de Polignac number, because 16622257 - 2¹¹ = 16620209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16622237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8311128 + 8311129.

It is an arithmetic number, because the mean of its divisors is an integer number (8311129).

Almost surely, 2^16622257 is an apocalyptic number.

It is an amenable number.

16622257 is a deficient number, since it is larger than the sum of its proper divisors (1).

16622257 is an equidigital number, since it uses as much as digits as its factorization.

16622257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 16622257 is about 4077.0402254577. The cubic root of 16622257 is about 255.2093986787.

The spelling of 16622257 in words is "sixteen million, six hundred twenty-two thousand, two hundred fifty-seven".