16321211 has 2 divisors, whose sum is σ = 16321212. Its totient is φ = 16321210.

The previous prime is 16321199. The next prime is 16321219. The reversal of 16321211 is 11212361.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16321211 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16321211.

It is not a weakly prime, because it can be changed into another prime (16321219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8160605 + 8160606.

It is an arithmetic number, because the mean of its divisors is an integer number (8160606).

Almost surely, 2^16321211 is an apocalyptic number.

16321211 is a deficient number, since it is larger than the sum of its proper divisors (1).

16321211 is an equidigital number, since it uses as much as digits as its factorization.

16321211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 17.

The square root of 16321211 is about 4039.9518561488. The cubic root of 16321211 is about 253.6593020352.

Adding to 16321211 its reverse (11212361), we get a palindrome (27533572).

The spelling of 16321211 in words is "sixteen million, three hundred twenty-one thousand, two hundred eleven".