131304140 has 48 divisors (see below), whose sum is σ = 308163744. Its totient is φ = 46579200.

The previous prime is 131304139. The next prime is 131304143. The reversal of 131304140 is 41403131.

It is a super-2 number, since 2×131304140² = 34481554362279200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131304143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1742 + ... + 16298.

It is an arithmetic number, because the mean of its divisors is an integer number (6420078).

Almost surely, 2^131304140 is an apocalyptic number.

131304140 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 131304140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154081872).

131304140 is an abundant number, since it is smaller than the sum of its proper divisors (176859604).

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

131304140 is a wasteful number, since it uses less digits than its factorization.

131304140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14618 (or 14616 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 131304140 is about 11458.8018570879. The cubic root of 131304140 is about 508.2680452446.

Adding to 131304140 its reverse (41403131), we get a palindrome (172707271).

The spelling of 131304140 in words is "one hundred thirty-one million, three hundred four thousand, one hundred forty".