131522857 has 2 divisors, whose sum is σ = 131522858. Its totient is φ = 131522856.

The previous prime is 131522837. The next prime is 131522861. The reversal of 131522857 is 758225131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119661721 + 11861136 = 10939^2 + 3444^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131522857 is a prime.

It is not a weakly prime, because it can be changed into another prime (131522837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65761428 + 65761429.

It is an arithmetic number, because the mean of its divisors is an integer number (65761429).

Almost surely, 2^131522857 is an apocalyptic number.

It is an amenable number.

131522857 is a deficient number, since it is larger than the sum of its proper divisors (1).

131522857 is an equidigital number, since it uses as much as digits as its factorization.

131522857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 34.

The square root of 131522857 is about 11468.3415104365. The cubic root of 131522857 is about 508.5501008206.

Adding to 131522857 its reverse (758225131), we get a palindrome (889747988).

The spelling of 131522857 in words is "one hundred thirty-one million, five hundred twenty-two thousand, eight hundred fifty-seven".