16513325 has 12 divisors (see below), whose sum is σ = 21183540. Its totient is φ = 12754560.

The previous prime is 16513313. The next prime is 16513331. The reversal of 16513325 is 52331561.

It can be written as a sum of positive squares in 6 ways, for example, as 175561 + 16337764 = 419^2 + 4042^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16513325 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16513294 and 16513303.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 10664 + ... + 12113.

It is an arithmetic number, because the mean of its divisors is an integer number (1765295).

Almost surely, 2^16513325 is an apocalyptic number.

It is an amenable number.

16513325 is a deficient number, since it is larger than the sum of its proper divisors (4670215).

16513325 is a wasteful number, since it uses less digits than its factorization.

16513325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22816 (or 22811 counting only the distinct ones).

The product of its digits is 2700, while the sum is 26.

The square root of 16513325 is about 4063.6590654237. The cubic root of 16513325 is about 254.6506815057.

Adding to 16513325 its reverse (52331561), we get a palindrome (68844886).

The spelling of 16513325 in words is "sixteen million, five hundred thirteen thousand, three hundred twenty-five".