131281529 has 2 divisors, whose sum is σ = 131281530. Its totient is φ = 131281528.

The previous prime is 131281523. The next prime is 131281541. The reversal of 131281529 is 925182131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131148304 + 133225 = 11452^2 + 365^2 .

It is a cyclic number.

It is not a de Polignac number, because 131281529 - 2⁸ = 131281273 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 131281495 and 131281504.

It is not a weakly prime, because it can be changed into another prime (131281523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65640764 + 65640765.

It is an arithmetic number, because the mean of its divisors is an integer number (65640765).

Almost surely, 2^131281529 is an apocalyptic number.

It is an amenable number.

131281529 is a deficient number, since it is larger than the sum of its proper divisors (1).

131281529 is an equidigital number, since it uses as much as digits as its factorization.

131281529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 32.

The square root of 131281529 is about 11457.8151931335. The cubic root of 131281529 is about 508.2388684329.

The spelling of 131281529 in words is "one hundred thirty-one million, two hundred eighty-one thousand, five hundred twenty-nine".