131216 has 20 divisors (see below), whose sum is σ = 260400. Its totient is φ = 64032.

The previous prime is 131213. The next prime is 131221. The reversal of 131216 is 612131.

It is a self number, because there is not a number n which added to its sum of digits gives 131216.

It is not an unprimeable number, because it can be changed into a prime (131213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875 + ... + 1013.

It is an arithmetic number, because the mean of its divisors is an integer number (13020).

2¹³¹²¹⁶ is an apocalyptic number.

131216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

131216 is a deficient number, since it is larger than the sum of its proper divisors (129184).

131216 is a wasteful number, since it uses less digits than its factorization.

131216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 200 counting only the distinct ones).

The product of its digits is 36, while the sum is 14.

The square root of 131216 is about 362.2374911574. The cubic root of 131216 is about 50.8154292108.

Adding to 131216 its reverse (612131), we get a palindrome (743347).

The spelling of 131216 in words is "one hundred thirty-one thousand, two hundred sixteen".