16222691 has 2 divisors, whose sum is σ = 16222692. Its totient is φ = 16222690.

The previous prime is 16222667. The next prime is 16222697. The reversal of 16222691 is 19622261.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16222691 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16222697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8111345 + 8111346.

It is an arithmetic number, because the mean of its divisors is an integer number (8111346).

Almost surely, 2^16222691 is an apocalyptic number.

16222691 is a deficient number, since it is larger than the sum of its proper divisors (1).

16222691 is an equidigital number, since it uses as much as digits as its factorization.

16222691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The square root of 16222691 is about 4027.7401852652. The cubic root of 16222691 is about 253.1478823189.

The spelling of 16222691 in words is "sixteen million, two hundred twenty-two thousand, six hundred ninety-one".