131666140 has 48 divisors (see below), whose sum is σ = 282240000. Its totient is φ = 51584832.

The previous prime is 131666123. The next prime is 131666159. The reversal of 131666140 is 41666131.

It is a junction number, because it is equal to n+sod(n) for n = 131666099 and 131666108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263611 + ... + 264109.

It is an arithmetic number, because the mean of its divisors is an integer number (5880000).

Almost surely, 2^131666140 is an apocalyptic number.

131666140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131666140 is an abundant number, since it is smaller than the sum of its proper divisors (150573860).

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

131666140 is a wasteful number, since it uses less digits than its factorization.

131666140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 131666140 is about 11474.5867027968. The cubic root of 131666140 is about 508.7347078694.

Subtracting from 131666140 its reverse (41666131), we obtain a palindrome (90000009).

It can be divided in two parts, 13166 and 6140, that added together give a triangular number (19306 = T₁₉₆).

The spelling of 131666140 in words is "one hundred thirty-one million, six hundred sixty-six thousand, one hundred forty".