131325281 has 2 divisors, whose sum is σ = 131325282. Its totient is φ = 131325280.

The previous prime is 131325277. The next prime is 131325307. The reversal of 131325281 is 182523131.

It is an a-pointer prime, because the next prime (131325307) can be obtained adding 131325281 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90250000 + 41075281 = 9500^2 + 6409^2 .

It is a cyclic number.

It is not a de Polignac number, because 131325281 - 2² = 131325277 is a prime.

It is a super-2 number, since 2×131325281² = 34492658859457922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131325281.

It is not a weakly prime, because it can be changed into another prime (131325211) 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 as a sum of consecutive naturals, namely, 65662640 + 65662641.

It is an arithmetic number, because the mean of its divisors is an integer number (65662641).

Almost surely, 2^131325281 is an apocalyptic number.

It is an amenable number.

131325281 is a deficient number, since it is larger than the sum of its proper divisors (1).

131325281 is an equidigital number, since it uses as much as digits as its factorization.

131325281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 131325281 is about 11459.7242986033. The cubic root of 131325281 is about 508.2953221660.

The spelling of 131325281 in words is "one hundred thirty-one million, three hundred twenty-five thousand, two hundred eighty-one".