165215712 has 48 divisors (see below), whose sum is σ = 434367360. Its totient is φ = 54986112.

The previous prime is 165215689. The next prime is 165215723. The reversal of 165215712 is 217512561.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 165215712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101239 + ... + 102857.

It is an arithmetic number, because the mean of its divisors is an integer number (9049320).

Almost surely, 2^165215712 is an apocalyptic number.

165215712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165215712 is an abundant number, since it is smaller than the sum of its proper divisors (269151648).

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

165215712 is a wasteful number, since it uses less digits than its factorization.

165215712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695 (or 2687 counting only the distinct ones).

The product of its digits is 4200, while the sum is 30.

The square root of 165215712 is about 12853.6264143626. The cubic root of 165215712 is about 548.7195690564.

The spelling of 165215712 in words is "one hundred sixty-five million, two hundred fifteen thousand, seven hundred twelve".