131244216 has 64 divisors (see below), whose sum is σ = 348986880. Its totient is φ = 40988160.

The previous prime is 131244209. The next prime is 131244247. The reversal of 131244216 is 612442131.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 109975 + ... + 111161.

It is an arithmetic number, because the mean of its divisors is an integer number (5452920).

Almost surely, 2^131244216 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 131244216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174493440).

131244216 is an abundant number, since it is smaller than the sum of its proper divisors (217742664).

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

131244216 is a wasteful number, since it uses less digits than its factorization.

131244216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484 (or 1480 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 131244216 is about 11456.1868001530. The cubic root of 131244216 is about 508.1907131085.

Adding to 131244216 its reverse (612442131), we get a palindrome (743686347).

The spelling of 131244216 in words is "one hundred thirty-one million, two hundred forty-four thousand, two hundred sixteen".