16553172 has 48 divisors (see below), whose sum is σ = 41694912. Its totient is φ = 5091840.

The previous prime is 16553149. The next prime is 16553179. The reversal of 16553172 is 27135561.

It is a super-3 number, since 3×16553172³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16553179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10047 + ... + 11577.

It is an arithmetic number, because the mean of its divisors is an integer number (868644).

Almost surely, 2^16553172 is an apocalyptic number.

16553172 is a gapful number since it is divisible by the number (12) 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 16553172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20847456).

16553172 is an abundant number, since it is smaller than the sum of its proper divisors (25141740).

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

16553172 is a wasteful number, since it uses less digits than its factorization.

16553172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608 (or 1606 counting only the distinct ones).

The product of its digits is 6300, while the sum is 30.

The square root of 16553172 is about 4068.5589586486. The cubic root of 16553172 is about 254.8553427905.

The spelling of 16553172 in words is "sixteen million, five hundred fifty-three thousand, one hundred seventy-two".