131440311 has 24 divisors (see below), whose sum is σ = 201670560. Its totient is φ = 82208256.

The previous prime is 131440307. The next prime is 131440313. The reversal of 131440311 is 113044131.

131440311 is a `hidden beast` number, since 1 + 314 + 40 + 311 = 666.

It is not a de Polignac number, because 131440311 - 2² = 131440307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131440313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53731 + ... + 56123.

It is an arithmetic number, because the mean of its divisors is an integer number (8402940).

Almost surely, 2^131440311 is an apocalyptic number.

131440311 is a deficient number, since it is larger than the sum of its proper divisors (70230249).

131440311 is a wasteful number, since it uses less digits than its factorization.

131440311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775 (or 2772 counting only the distinct ones).

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

The square root of 131440311 is about 11464.7420817042. The cubic root of 131440311 is about 508.4436869677.

Adding to 131440311 its reverse (113044131), we get a palindrome (244484442).

The spelling of 131440311 in words is "one hundred thirty-one million, four hundred forty thousand, three hundred eleven".