186131131 has 2 divisors, whose sum is σ = 186131132. Its totient is φ = 186131130.

The previous prime is 186131119. The next prime is 186131221. The reversal of 186131131 is 131131681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 186131131 - 2⁹ = 186130619 is a prime.

It is a super-2 number, since 2×186131131² = 69289595854678322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 186131096 and 186131105.

It is not a weakly prime, because it can be changed into another prime (186131731) 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, 93065565 + 93065566.

It is an arithmetic number, because the mean of its divisors is an integer number (93065566).

Almost surely, 2^186131131 is an apocalyptic number.

186131131 is a deficient number, since it is larger than the sum of its proper divisors (1).

186131131 is an equidigital number, since it uses as much as digits as its factorization.

186131131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 25.

The square root of 186131131 is about 13642.9883456668. The cubic root of 186131131 is about 570.9608611351.

The spelling of 186131131 in words is "one hundred eighty-six million, one hundred thirty-one thousand, one hundred thirty-one".