16510013 has 4 divisors (see below), whose sum is σ = 17780028. Its totient is φ = 15240000.

The previous prime is 16510001. The next prime is 16510033. The reversal of 16510013 is 31001561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31001561 = 661 ⋅46901.

It can be written as a sum of positive squares in 2 ways, for example, as 6543364 + 9966649 = 2558^2 + 3157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16510013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16509973 and 16510000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16510033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634988 + ... + 635013.

It is an arithmetic number, because the mean of its divisors is an integer number (4445007).

Almost surely, 2^16510013 is an apocalyptic number.

16510013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16510013 is a deficient number, since it is larger than the sum of its proper divisors (1270015).

16510013 is a wasteful number, since it uses less digits than its factorization.

16510013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270014.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 16510013 is about 4063.2515304864. The cubic root of 16510013 is about 254.6336556705.

Adding to 16510013 its reverse (31001561), we get a palindrome (47511574).

The spelling of 16510013 in words is "sixteen million, five hundred ten thousand, thirteen".