131608481 has 2 divisors, whose sum is σ = 131608482. Its totient is φ = 131608480.

The previous prime is 131608447. The next prime is 131608489. The reversal of 131608481 is 184806131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110586256 + 21022225 = 10516^2 + 4585^2 .

It is a cyclic number.

It is not a de Polignac number, because 131608481 - 2⁶ = 131608417 is a prime.

It is a super-2 number, since 2×131608481² = 34641584542254722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131608489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65804240 + 65804241.

It is an arithmetic number, because the mean of its divisors is an integer number (65804241).

Almost surely, 2^131608481 is an apocalyptic number.

It is an amenable number.

131608481 is a deficient number, since it is larger than the sum of its proper divisors (1).

131608481 is an equidigital number, since it uses as much as digits as its factorization.

131608481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 131608481 is about 11472.0739624533. The cubic root of 131608481 is about 508.6604356295.

The spelling of 131608481 in words is "one hundred thirty-one million, six hundred eight thousand, four hundred eighty-one".