131725831 has 2 divisors, whose sum is σ = 131725832. Its totient is φ = 131725830.

The previous prime is 131725817. The next prime is 131725837. The reversal of 131725831 is 138527131.

It is a strong prime.

It is an emirp because it is prime and its reverse (138527131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131725831 is a prime.

It is a super-2 number, since 2×131725831² = 34703389105281122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131725793 and 131725802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131725837) 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, 65862915 + 65862916.

It is an arithmetic number, because the mean of its divisors is an integer number (65862916).

Almost surely, 2^131725831 is an apocalyptic number.

131725831 is a deficient number, since it is larger than the sum of its proper divisors (1).

131725831 is an equidigital number, since it uses as much as digits as its factorization.

131725831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 31.

The square root of 131725831 is about 11477.1874167847. The cubic root of 131725831 is about 508.8115747481.

The spelling of 131725831 in words is "one hundred thirty-one million, seven hundred twenty-five thousand, eight hundred thirty-one".