16531872 has 96 divisors (see below), whose sum is σ = 50424192. Its totient is φ = 4644864.

The previous prime is 16531849. The next prime is 16531873. The reversal of 16531872 is 27813561.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (16531873) 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, 48888 + ... + 49224.

It is an arithmetic number, because the mean of its divisors is an integer number (525252).

Almost surely, 2^16531872 is an apocalyptic number.

16531872 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 16531872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25212096).

16531872 is an abundant number, since it is smaller than the sum of its proper divisors (33892320).

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

16531872 is a wasteful number, since it uses less digits than its factorization.

16531872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 422 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 16531872 is about 4065.9404816106. The cubic root of 16531872 is about 254.7459831095.

The spelling of 16531872 in words is "sixteen million, five hundred thirty-one thousand, eight hundred seventy-two".