131606140 has 24 divisors (see below), whose sum is σ = 276599232. Its totient is φ = 52599360.

The previous prime is 131606113. The next prime is 131606143. The reversal of 131606140 is 41606131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131606143) 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, 35662 + ... + 39178.

It is an arithmetic number, because the mean of its divisors is an integer number (11524968).

Almost surely, 2^131606140 is an apocalyptic number.

131606140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131606140 is an abundant number, since it is smaller than the sum of its proper divisors (144993092).

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

131606140 is a wasteful number, since it uses less digits than its factorization.

131606140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5397 (or 5395 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 131606140 is about 11471.9719316254. The cubic root of 131606140 is about 508.6574196609.

Subtracting from 131606140 its reverse (41606131), we obtain a palindrome (90000009).

The spelling of 131606140 in words is "one hundred thirty-one million, six hundred six thousand, one hundred forty".