164181131 has 2 divisors, whose sum is σ = 164181132. Its totient is φ = 164181130.

The previous prime is 164181091. The next prime is 164181137. The reversal of 164181131 is 131181461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164181131 - 2⁶ = 164181067 is a prime.

It is a super-2 number, since 2×164181131² = 53910887552878322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164181131.

It is not a weakly prime, because it can be changed into another prime (164181137) 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, 82090565 + 82090566.

It is an arithmetic number, because the mean of its divisors is an integer number (82090566).

Almost surely, 2^164181131 is an apocalyptic number.

164181131 is a deficient number, since it is larger than the sum of its proper divisors (1).

164181131 is an equidigital number, since it uses as much as digits as its factorization.

164181131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 26.

The square root of 164181131 is about 12813.3185006851. The cubic root of 164181131 is about 547.5718090727.

The spelling of 164181131 in words is "one hundred sixty-four million, one hundred eighty-one thousand, one hundred thirty-one".