131640311 has 4 divisors (see below), whose sum is σ = 143607624. Its totient is φ = 119673000.

The previous prime is 131640259. The next prime is 131640343. The reversal of 131640311 is 113046131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113046131 = 11 ⋅10276921.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131640311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131640361) 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 3 ways as a sum of consecutive naturals, for example, 5983640 + ... + 5983661.

It is an arithmetic number, because the mean of its divisors is an integer number (35901906).

Almost surely, 2^131640311 is an apocalyptic number.

131640311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131640311 is a deficient number, since it is larger than the sum of its proper divisors (11967313).

131640311 is a wasteful number, since it uses less digits than its factorization.

131640311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11967312.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 131640311 is about 11473.4611604345. The cubic root of 131640311 is about 508.7014394627.

Adding to 131640311 its reverse (113046131), we get a palindrome (244686442).

The spelling of 131640311 in words is "one hundred thirty-one million, six hundred forty thousand, three hundred eleven".