165731996 has 6 divisors (see below), whose sum is σ = 290031000. Its totient is φ = 82865996.

The previous prime is 165731987. The next prime is 165732067. The reversal of 165731996 is 699137561.

It is a happy number.

165731996 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 165731996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20716496 + ... + 20716503.

It is an arithmetic number, because the mean of its divisors is an integer number (48338500).

Almost surely, 2^165731996 is an apocalyptic number.

It is an amenable number.

165731996 is a deficient number, since it is larger than the sum of its proper divisors (124299004).

165731996 is a wasteful number, since it uses less digits than its factorization.

165731996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41433003 (or 41433001 counting only the distinct ones).

The product of its digits is 306180, while the sum is 47.

The square root of 165731996 is about 12873.6939531744. The cubic root of 165731996 is about 549.2905408914.

The spelling of 165731996 in words is "one hundred sixty-five million, seven hundred thirty-one thousand, nine hundred ninety-six".