131306140 has 24 divisors (see below), whose sum is σ = 315135072. Its totient is φ = 45019200.

The previous prime is 131306129. The next prime is 131306141. The reversal of 131306140 is 41603131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131306141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468811 + ... + 469090.

It is an arithmetic number, because the mean of its divisors is an integer number (13130628).

Almost surely, 2^131306140 is an apocalyptic number.

131306140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131306140 is an abundant number, since it is smaller than the sum of its proper divisors (183828932).

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

131306140 is a wasteful number, since it uses less digits than its factorization.

131306140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937917 (or 937915 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 131306140 is about 11458.8891259144. The cubic root of 131306140 is about 508.2706258460.

Adding to 131306140 its reverse (41603131), we get a palindrome (172909271).

The spelling of 131306140 in words is "one hundred thirty-one million, three hundred six thousand, one hundred forty".