131106240 has 84 divisors (see below), whose sum is σ = 450960744. Its totient is φ = 34960896.

The previous prime is 131106229. The next prime is 131106247. The reversal of 131106240 is 42601131.

It is a happy number.

131106240 is a `hidden beast` number, since 1 + 31 + 10 + 624 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131106247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19882 + ... + 25641.

Almost surely, 2^131106240 is an apocalyptic number.

131106240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131106240 is an abundant number, since it is smaller than the sum of its proper divisors (319854504).

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

131106240 is a wasteful number, since it uses less digits than its factorization.

131106240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45546 (or 45533 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 131106240 is about 11450.1633176125. The cubic root of 131106240 is about 508.0125650477.

Adding to 131106240 its reverse (42601131), we get a palindrome (173707371).

The spelling of 131106240 in words is "one hundred thirty-one million, one hundred six thousand, two hundred forty".