16013321 has 2 divisors, whose sum is σ = 16013322. Its totient is φ = 16013320.

The previous prime is 16013287. The next prime is 16013351. The reversal of 16013321 is 12331061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11868025 + 4145296 = 3445^2 + 2036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16013321 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 16013321.

It is not a weakly prime, because it can be changed into another prime (16013351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8006660 + 8006661.

It is an arithmetic number, because the mean of its divisors is an integer number (8006661).

Almost surely, 2^16013321 is an apocalyptic number.

It is an amenable number.

16013321 is a deficient number, since it is larger than the sum of its proper divisors (1).

16013321 is an equidigital number, since it uses as much as digits as its factorization.

16013321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 16013321 is about 4001.6647785640. The cubic root of 16013321 is about 252.0541214486.

Adding to 16013321 its reverse (12331061), we get a palindrome (28344382).

The spelling of 16013321 in words is "sixteen million, thirteen thousand, three hundred twenty-one".