131304340 has 36 divisors (see below), whose sum is σ = 279394164. Its totient is φ = 51834496.

The previous prime is 131304337. The next prime is 131304353. The reversal of 131304340 is 43403131.

It can be written as a sum of positive squares in 2 ways, for example, as 50951044 + 80353296 = 7138^2 + 8964^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137304 + ... + 138256.

It is an arithmetic number, because the mean of its divisors is an integer number (7760949).

Almost surely, 2^131304340 is an apocalyptic number.

131304340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131304340 is an abundant number, since it is smaller than the sum of its proper divisors (148089824).

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

131304340 is an equidigital number, since it uses as much as digits as its factorization.

131304340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128 (or 1043 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 131304340 is about 11458.8105840004. The cubic root of 131304340 is about 508.2683033059.

Adding to 131304340 its reverse (43403131), we get a palindrome (174707471).

The spelling of 131304340 in words is "one hundred thirty-one million, three hundred four thousand, three hundred forty".