165731982 has 16 divisors (see below), whose sum is σ = 356961360. Its totient is φ = 50994432.

The previous prime is 165731981. The next prime is 165731987. The reversal of 165731982 is 289137561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165731981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1062307 + ... + 1062462.

It is an arithmetic number, because the mean of its divisors is an integer number (22310085).

Almost surely, 2^165731982 is an apocalyptic number.

165731982 is an abundant number, since it is smaller than the sum of its proper divisors (191229378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165731982 is a wasteful number, since it uses less digits than its factorization.

165731982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124787.

The product of its digits is 90720, while the sum is 42.

The square root of 165731982 is about 12873.6934094299. The cubic root of 165731982 is about 549.2905254245.

The spelling of 165731982 in words is "one hundred sixty-five million, seven hundred thirty-one thousand, nine hundred eighty-two".