131631427 has 2 divisors, whose sum is σ = 131631428. Its totient is φ = 131631426.

The previous prime is 131631413. The next prime is 131631431. The reversal of 131631427 is 724136131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131631427 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 131631395 and 131631404.

It is not a weakly prime, because it can be changed into another prime (131631457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65815713 + 65815714.

It is an arithmetic number, because the mean of its divisors is an integer number (65815714).

Almost surely, 2^131631427 is an apocalyptic number.

131631427 is a deficient number, since it is larger than the sum of its proper divisors (1).

131631427 is an equidigital number, since it uses as much as digits as its factorization.

131631427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 131631427 is about 11473.0739995870. The cubic root of 131631427 is about 508.6899956397.

Adding to 131631427 its reverse (724136131), we get a palindrome (855767558).

The spelling of 131631427 in words is "one hundred thirty-one million, six hundred thirty-one thousand, four hundred twenty-seven".