165782131 has 2 divisors, whose sum is σ = 165782132. Its totient is φ = 165782130.

The previous prime is 165782119. The next prime is 165782167. The reversal of 165782131 is 131287561.

It is a happy number.

165782131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165782131 - 2⁹ = 165781619 is a prime.

It is a super-2 number, since 2×165782131² = 54967429917802322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (165782101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82891065 + 82891066.

It is an arithmetic number, because the mean of its divisors is an integer number (82891066).

Almost surely, 2^165782131 is an apocalyptic number.

165782131 is a deficient number, since it is larger than the sum of its proper divisors (1).

165782131 is an equidigital number, since it uses as much as digits as its factorization.

165782131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 34.

The square root of 165782131 is about 12875.6409937525. The cubic root of 165782131 is about 549.3459232869.

The spelling of 165782131 in words is "one hundred sixty-five million, seven hundred eighty-two thousand, one hundred thirty-one".