13216140 has 144 divisors (see below), whose sum is σ = 48589632. Its totient is φ = 2838528.

The previous prime is 13216127. The next prime is 13216171. The reversal of 13216140 is 4161231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21112 + ... + 21728.

It is an arithmetic number, because the mean of its divisors is an integer number (337428).

Almost surely, 2^13216140 is an apocalyptic number.

13216140 is a gapful number since it is divisible by the number (10) 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 13216140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24294816).

13216140 is an abundant number, since it is smaller than the sum of its proper divisors (35373492).

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

13216140 is a wasteful number, since it uses less digits than its factorization.

13216140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 13216140 is about 3635.4009407492. The cubic root of 13216140 is about 236.4294345236.

Adding to 13216140 its reverse (4161231), we get a palindrome (17377371).

It can be divided in two parts, 13 and 216140, that added together give a triangular number (216153 = T₆₅₇).

The spelling of 13216140 in words is "thirteen million, two hundred sixteen thousand, one hundred forty".