131255231 has 2 divisors, whose sum is σ = 131255232. Its totient is φ = 131255230.

The previous prime is 131255219. The next prime is 131255233. The reversal of 131255231 is 132552131.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (132552131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131255231 is a prime.

It is a super-2 number, since 2×131255231² = 34455871329726722, which contains 22 as substring.

Together with 131255233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 131255197 and 131255206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131255233) 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 as a sum of consecutive naturals, namely, 65627615 + 65627616.

It is an arithmetic number, because the mean of its divisors is an integer number (65627616).

Almost surely, 2^131255231 is an apocalyptic number.

131255231 is a deficient number, since it is larger than the sum of its proper divisors (1).

131255231 is an equidigital number, since it uses as much as digits as its factorization.

131255231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 23.

The square root of 131255231 is about 11456.6675346717. The cubic root of 131255231 is about 508.2049297709.

The spelling of 131255231 in words is "one hundred thirty-one million, two hundred fifty-five thousand, two hundred thirty-one".