16541218 has 4 divisors (see below), whose sum is σ = 24811830. Its totient is φ = 8270608.

The previous prime is 16541201. The next prime is 16541219. The reversal of 16541218 is 81214561.

16541218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81214561 = 439 ⋅184999.

It can be written as a sum of positive squares in only one way, i.e., 16540489 + 729 = 4067^2 + 27^2 .

It is a super-2 number, since 2×16541218² = 547223785847048, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16541219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4135303 + ... + 4135306.

Almost surely, 2^16541218 is an apocalyptic number.

16541218 is a deficient number, since it is larger than the sum of its proper divisors (8270612).

16541218 is an equidigital number, since it uses as much as digits as its factorization.

16541218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8270611.

The product of its digits is 1920, while the sum is 28.

The square root of 16541218 is about 4067.0896228138. The cubic root of 16541218 is about 254.7939794373.

Adding to 16541218 its reverse (81214561), we get a palindrome (97755779).

The spelling of 16541218 in words is "sixteen million, five hundred forty-one thousand, two hundred eighteen".