16516013 has 2 divisors, whose sum is σ = 16516014. Its totient is φ = 16516012.

The previous prime is 16516009. The next prime is 16516021. The reversal of 16516013 is 31061561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13564489 + 2951524 = 3683^2 + 1718^2 .

It is a cyclic number.

It is not a de Polignac number, because 16516013 - 2² = 16516009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16516013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16516043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8258006 + 8258007.

It is an arithmetic number, because the mean of its divisors is an integer number (8258007).

Almost surely, 2^16516013 is an apocalyptic number.

It is an amenable number.

16516013 is a deficient number, since it is larger than the sum of its proper divisors (1).

16516013 is an equidigital number, since it uses as much as digits as its factorization.

16516013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 16516013 is about 4063.9897883730. The cubic root of 16516013 is about 254.6644979013.

Adding to 16516013 its reverse (31061561), we get a palindrome (47577574).

The spelling of 16516013 in words is "sixteen million, five hundred sixteen thousand, thirteen".