16216513 has 2 divisors, whose sum is σ = 16216514. Its totient is φ = 16216512.

The previous prime is 16216511. The next prime is 16216523. The reversal of 16216513 is 31561261.

16216513 = 2847² + 2848².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8111104 + 8105409 = 2848^2 + 2847^2 .

It is a cyclic number.

It is not a de Polignac number, because 16216513 - 2¹ = 16216511 is a prime.

Together with 16216511, it forms a pair of twin primes.

It is a plaindrome in base 9.

It is not a weakly prime, because it can be changed into another prime (16216511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8108256 + 8108257.

It is an arithmetic number, because the mean of its divisors is an integer number (8108257).

Almost surely, 2^16216513 is an apocalyptic number.

16216513 is the 2848-th centered square number.

It is an amenable number.

16216513 is a deficient number, since it is larger than the sum of its proper divisors (1).

16216513 is an equidigital number, since it uses as much as digits as its factorization.

16216513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 25.

The square root of 16216513 is about 4026.9731809388. The cubic root of 16216513 is about 253.1157432575.

Adding to 16216513 its reverse (31561261), we get a palindrome (47777774).

The spelling of 16216513 in words is "sixteen million, two hundred sixteen thousand, five hundred thirteen".