131801056 has 48 divisors (see below), whose sum is σ = 271101600. Its totient is φ = 62995968.

The previous prime is 131801041. The next prime is 131801071. The reversal of 131801056 is 650108131.

It is an interprime number because it is at equal distance from previous prime (131801041) and next prime (131801071).

It is a self number, because there is not a number n which added to its sum of digits gives 131801056.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100501 + ... + 101803.

It is an arithmetic number, because the mean of its divisors is an integer number (5647950).

Almost surely, 2^131801056 is an apocalyptic number.

131801056 is a gapful number since it is divisible by the number (16) 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 131801056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135550800).

131801056 is an abundant number, since it is smaller than the sum of its proper divisors (139300544).

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

131801056 is a wasteful number, since it uses less digits than its factorization.

131801056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451 (or 1443 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 131801056 is about 11480.4641021171. The cubic root of 131801056 is about 508.9084124165.

Adding to 131801056 its reverse (650108131), we get a palindrome (781909187).

The spelling of 131801056 in words is "one hundred thirty-one million, eight hundred one thousand, fifty-six".