131315771 has 4 divisors (see below), whose sum is σ = 131879592. Its totient is φ = 130751952.

The previous prime is 131315761. The next prime is 131315773. The reversal of 131315771 is 177513131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131315771 - 2²⁶ = 64206907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131315773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281561 + ... + 282026.

It is an arithmetic number, because the mean of its divisors is an integer number (32969898).

Almost surely, 2^131315771 is an apocalyptic number.

131315771 is a deficient number, since it is larger than the sum of its proper divisors (563821).

131315771 is an equidigital number, since it uses as much as digits as its factorization.

131315771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563820.

The product of its digits is 2205, while the sum is 29.

The square root of 131315771 is about 11459.3093596429. The cubic root of 131315771 is about 508.2830523649.

The spelling of 131315771 in words is "one hundred thirty-one million, three hundred fifteen thousand, seven hundred seventy-one".