16506325 has 24 divisors (see below), whose sum is σ = 22516416. Its totient is φ = 11904000.

The previous prime is 16506311. The next prime is 16506349. The reversal of 16506325 is 52360561.

It is not a de Polignac number, because 16506325 - 2¹⁵ = 16473557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16506293 and 16506302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52920 + ... + 53230.

It is an arithmetic number, because the mean of its divisors is an integer number (938184).

Almost surely, 2^16506325 is an apocalyptic number.

It is an amenable number.

16506325 is a deficient number, since it is larger than the sum of its proper divisors (6010091).

16506325 is a wasteful number, since it uses less digits than its factorization.

16506325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 16506325 is about 4062.7976814013. The cubic root of 16506325 is about 254.6146942710.

Adding to 16506325 its reverse (52360561), we get a palindrome (68866886).

It can be divided in two parts, 16506 and 325, that multiplied together give a triangular number (5364450 = T₃₂₇₅).

The spelling of 16506325 in words is "sixteen million, five hundred six thousand, three hundred twenty-five".