16563325 has 12 divisors (see below), whose sum is σ = 20637568. Its totient is φ = 13186800.

The previous prime is 16563319. The next prime is 16563347. The reversal of 16563325 is 52336561.

It is not a de Polignac number, because 16563325 - 2¹¹ = 16561277 is a prime.

It is a super-3 number, since 3×16563325³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

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, 4090 + ... + 7060.

Almost surely, 2^16563325 is an apocalyptic number.

It is an amenable number.

16563325 is a deficient number, since it is larger than the sum of its proper divisors (4074243).

16563325 is a wasteful number, since it uses less digits than its factorization.

16563325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3204 (or 3199 counting only the distinct ones).

The product of its digits is 16200, while the sum is 31.

The square root of 16563325 is about 4069.8065064570. The cubic root of 16563325 is about 254.9074378904.

Adding to 16563325 its reverse (52336561), we get a palindrome (68899886).

The spelling of 16563325 in words is "sixteen million, five hundred sixty-three thousand, three hundred twenty-five".