131216844 has 24 divisors (see below), whose sum is σ = 334006848. Its totient is φ = 39762640.

The previous prime is 131216821. The next prime is 131216857. The reversal of 131216844 is 448612131.

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, 496902 + ... + 497165.

It is an arithmetic number, because the mean of its divisors is an integer number (13916952).

Almost surely, 2^131216844 is an apocalyptic number.

It is an amenable number.

131216844 is an abundant number, since it is smaller than the sum of its proper divisors (202790004).

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

131216844 is a wasteful number, since it uses less digits than its factorization.

131216844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994085 (or 994083 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 131216844 is about 11454.9920995171. The cubic root of 131216844 is about 508.1553816129.

Adding to 131216844 its reverse (448612131), we get a palindrome (579828975).

The spelling of 131216844 in words is "one hundred thirty-one million, two hundred sixteen thousand, eight hundred forty-four".