16513313 has 2 divisors, whose sum is σ = 16513314. Its totient is φ = 16513312.

The previous prime is 16513303. The next prime is 16513331. The reversal of 16513313 is 31331561.

It is a happy number.

Together with next prime (16513331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9690769 + 6822544 = 3113^2 + 2612^2 .

It is a cyclic number.

It is not a de Polignac number, because 16513313 - 2¹⁶ = 16447777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16513303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8256656 + 8256657.

It is an arithmetic number, because the mean of its divisors is an integer number (8256657).

Almost surely, 2^16513313 is an apocalyptic number.

It is an amenable number.

16513313 is a deficient number, since it is larger than the sum of its proper divisors (1).

16513313 is an equidigital number, since it uses as much as digits as its factorization.

16513313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 810, while the sum is 23.

The square root of 16513313 is about 4063.6575889216. The cubic root of 16513313 is about 254.6506198220.

Adding to 16513313 its reverse (31331561), we get a palindrome (47844874).

The spelling of 16513313 in words is "sixteen million, five hundred thirteen thousand, three hundred thirteen".