16544131 has 4 divisors (see below), whose sum is σ = 16824600. Its totient is φ = 16263664.

The previous prime is 16544119. The next prime is 16544137. The reversal of 16544131 is 13144561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16544131 - 2²³ = 8155523 is a prime.

It is a super-2 number, since 2×16544131² = 547416541090322, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 16544096 and 16544105.

It is not an unprimeable number, because it can be changed into a prime (16544137) 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 3 ways as a sum of consecutive naturals, for example, 140146 + ... + 140263.

It is an arithmetic number, because the mean of its divisors is an integer number (4206150).

Almost surely, 2^16544131 is an apocalyptic number.

16544131 is a deficient number, since it is larger than the sum of its proper divisors (280469).

16544131 is an equidigital number, since it uses as much as digits as its factorization.

16544131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280468.

The product of its digits is 1440, while the sum is 25.

The square root of 16544131 is about 4067.4477255399. The cubic root of 16544131 is about 254.8089354358.

Adding to 16544131 its reverse (13144561), we get a palindrome (29688692).

The spelling of 16544131 in words is "sixteen million, five hundred forty-four thousand, one hundred thirty-one".