131231760 has 120 divisors (see below), whose sum is σ = 447263040. Its totient is φ = 31806720.

The previous prime is 131231741. The next prime is 131231783. The reversal of 131231760 is 67132131.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a self number, because there is not a number n which added to its sum of digits gives 131231760.

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 23 ways as a sum of consecutive naturals, for example, 26781 + ... + 31299.

It is an arithmetic number, because the mean of its divisors is an integer number (3727192).

Almost surely, 2^131231760 is an apocalyptic number.

131231760 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 131231760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223631520).

131231760 is an abundant number, since it is smaller than the sum of its proper divisors (316031280).

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

131231760 is a wasteful number, since it uses less digits than its factorization.

131231760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557 (or 4540 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 131231760 is about 11455.6431508667. The cubic root of 131231760 is about 508.1746356412.

Adding to 131231760 its reverse (67132131), we get a palindrome (198363891).

The spelling of 131231760 in words is "one hundred thirty-one million, two hundred thirty-one thousand, seven hundred sixty".