131230140 has 48 divisors (see below), whose sum is σ = 389061792. Its totient is φ = 32935936.

The previous prime is 131230117. The next prime is 131230147. The reversal of 131230140 is 41032131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131230147) 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, 63309 + ... + 65348.

It is an arithmetic number, because the mean of its divisors is an integer number (8105454).

Almost surely, 2^131230140 is an apocalyptic number.

131230140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131230140 is an abundant number, since it is smaller than the sum of its proper divisors (257831652).

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

131230140 is a wasteful number, since it uses less digits than its factorization.

131230140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128686 (or 128684 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 131230140 is about 11455.5724431388. The cubic root of 131230140 is about 508.1725445663.

Adding to 131230140 its reverse (41032131), we get a palindrome (172262271).

The spelling of 131230140 in words is "one hundred thirty-one million, two hundred thirty thousand, one hundred forty".