165180539 has 2 divisors, whose sum is σ = 165180540. Its totient is φ = 165180538.

The previous prime is 165180467. The next prime is 165180559. The reversal of 165180539 is 935081561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165180539 - 2⁸ = 165180283 is a prime.

It is a super-2 number, since 2×165180539² = 54569220928661042, which contains 22 as substring.

It is equal to p_9248474 and since 165180539 and 9248474 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (165180559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82590269 + 82590270.

It is an arithmetic number, because the mean of its divisors is an integer number (82590270).

Almost surely, 2^165180539 is an apocalyptic number.

165180539 is a deficient number, since it is larger than the sum of its proper divisors (1).

165180539 is an equidigital number, since it uses as much as digits as its factorization.

165180539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 165180539 is about 12852.2581284380. The cubic root of 165180539 is about 548.6806270717.

The spelling of 165180539 in words is "one hundred sixty-five million, one hundred eighty thousand, five hundred thirty-nine".