131555340 has 168 divisors, whose sum is σ = 473749920. Its totient is φ = 30046464.

The previous prime is 131555327. The next prime is 131555341. The reversal of 131555340 is 43555131.

131555340 is a `hidden beast` number, since 1 + 315 + 5 + 5 + 340 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131555341) by changing a digit.

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 55 ways as a sum of consecutive naturals, for example, 101416 + ... + 102704.

It is an arithmetic number, because the mean of its divisors is an integer number (2819940).

Almost surely, 2^131555340 is an apocalyptic number.

131555340 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 131555340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236874960).

131555340 is an abundant number, since it is smaller than the sum of its proper divisors (342194580).

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

131555340 is a wasteful number, since it uses less digits than its factorization.

131555340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323 (or 1306 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 131555340 is about 11469.7576260355. The cubic root of 131555340 is about 508.5919639450.

The spelling of 131555340 in words is "one hundred thirty-one million, five hundred fifty-five thousand, three hundred forty".