13642216 has 32 divisors (see below), whose sum is σ = 29736000. Its totient is φ = 5746176.

The previous prime is 13642207. The next prime is 13642219. The reversal of 13642216 is 61224631.

It is a super-2 number, since 2×13642216² = 372220114781312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13642219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1240 + ... + 5368.

It is an arithmetic number, because the mean of its divisors is an integer number (929250).

Almost surely, 2^13642216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13642216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14868000).

13642216 is an abundant number, since it is smaller than the sum of its proper divisors (16093784).

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

13642216 is a wasteful number, since it uses less digits than its factorization.

13642216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4201 (or 4197 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 13642216 is about 3693.5370581598. The cubic root of 13642216 is about 238.9433640886.

Adding to 13642216 its reverse (61224631), we get a palindrome (74866847).

The spelling of 13642216 in words is "thirteen million, six hundred forty-two thousand, two hundred sixteen".