131100240 has 160 divisors (see below), whose sum is σ = 427401216. Its totient is φ = 33200640.

The previous prime is 131100223. The next prime is 131100251. The reversal of 131100240 is 42001131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 498349 + ... + 498611.

Almost surely, 2^131100240 is an apocalyptic number.

131100240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131100240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213700608).

131100240 is an abundant number, since it is smaller than the sum of its proper divisors (296300976).

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

131100240 is a wasteful number, since it uses less digits than its factorization.

131100240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 131100240 is about 11449.9013096183. The cubic root of 131100240 is about 508.0048152973.

Adding to 131100240 its reverse (42001131), we get a palindrome (173101371).

The spelling of 131100240 in words is "one hundred thirty-one million, one hundred thousand, two hundred forty".