16563000 has 64 divisors (see below), whose sum is σ = 51685920. Its totient is φ = 4416000.

The previous prime is 16562999. The next prime is 16563007. The reversal of 16563000 is 36561.

16563000 is nontrivially palindromic in base 9.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16563007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240 + ... + 5760.

Almost surely, 2^16563000 is an apocalyptic number.

16563000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16563000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25842960).

16563000 is an abundant number, since it is smaller than the sum of its proper divisors (35122920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16563000 is a wasteful number, since it uses less digits than its factorization.

16563000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5545 (or 5531 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 16563000 is about 4069.7665780730. The cubic root of 16563000 is about 254.9057706434.

Adding to 16563000 its reverse (36561), we get a palindrome (16599561).

It can be divided in two parts, 1656 and 3000, that added together give a triangular number (4656 = T₉₆).

The spelling of 16563000 in words is "sixteen million, five hundred sixty-three thousand".