131288231 has 2 divisors, whose sum is σ = 131288232. Its totient is φ = 131288230.

The previous prime is 131288207. The next prime is 131288279. The reversal of 131288231 is 132882131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131288231 - 2¹⁸ = 131026087 is a prime.

It is a super-2 number, since 2×131288231² = 34473199198218722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 131288194 and 131288203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131288291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65644115 + 65644116.

It is an arithmetic number, because the mean of its divisors is an integer number (65644116).

Almost surely, 2^131288231 is an apocalyptic number.

131288231 is a deficient number, since it is larger than the sum of its proper divisors (1).

131288231 is an equidigital number, since it uses as much as digits as its factorization.

131288231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 29.

The square root of 131288231 is about 11458.1076535351. The cubic root of 131288231 is about 508.2475169177.

The spelling of 131288231 in words is "one hundred thirty-one million, two hundred eighty-eight thousand, two hundred thirty-one".