131343408 has 120 divisors (see below), whose sum is σ = 422666400. Its totient is φ = 37297152.

The previous prime is 131343379. The next prime is 131343449. The reversal of 131343408 is 804343131.

131343408 is a `hidden beast` number, since 1 + 313 + 4 + 340 + 8 = 666.

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, 230548 + ... + 231116.

It is an arithmetic number, because the mean of its divisors is an integer number (3522220).

Almost surely, 2^131343408 is an apocalyptic number.

131343408 is a gapful number since it is divisible by the number (18) 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 131343408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211333200).

131343408 is an abundant number, since it is smaller than the sum of its proper divisors (291322992).

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

131343408 is a wasteful number, since it uses less digits than its factorization.

131343408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 131343408 is about 11460.5151716666. The cubic root of 131343408 is about 508.3187079790.

Adding to 131343408 its reverse (804343131), we get a palindrome (935686539).

The spelling of 131343408 in words is "one hundred thirty-one million, three hundred forty-three thousand, four hundred eight".