165258287231 has 4 divisors (see below), whose sum is σ = 165275353200. Its totient is φ = 165241221264.

The previous prime is 165258287179. The next prime is 165258287261. The reversal of 165258287231 is 132782852561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132782852561 = 17 ⋅7810756033.

It is a cyclic number.

It is not a de Polignac number, because 165258287231 - 2⁶ = 165258287167 is a prime.

It is a super-2 number, since 2×165258287231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165258287231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165258287261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8518451 + ... + 8537828.

It is an arithmetic number, because the mean of its divisors is an integer number (41318838300).

Almost surely, 2^165258287231 is an apocalyptic number.

165258287231 is a deficient number, since it is larger than the sum of its proper divisors (17065969).

165258287231 is an equidigital number, since it uses as much as digits as its factorization.

165258287231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17065968.

The product of its digits is 1612800, while the sum is 50.

The spelling of 165258287231 in words is "one hundred sixty-five billion, two hundred fifty-eight million, two hundred eighty-seven thousand, two hundred thirty-one".