131216244 has 24 divisors (see below), whose sum is σ = 306559680. Its totient is φ = 43683264.

The previous prime is 131216231. The next prime is 131216279. The reversal of 131216244 is 442612131.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3552 + ... + 16584.

It is an arithmetic number, because the mean of its divisors is an integer number (12773320).

Almost surely, 2^131216244 is an apocalyptic number.

It is an amenable number.

131216244 is an abundant number, since it is smaller than the sum of its proper divisors (175343436).

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

131216244 is a wasteful number, since it uses less digits than its factorization.

131216244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13879 (or 13877 counting only the distinct ones).

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

The square root of 131216244 is about 11454.9659100322. The cubic root of 131216244 is about 508.1546070840.

Adding to 131216244 its reverse (442612131), we get a palindrome (573828375).

The spelling of 131216244 in words is "one hundred thirty-one million, two hundred sixteen thousand, two hundred forty-four".