165216252 has 12 divisors (see below), whose sum is σ = 385504616. Its totient is φ = 55072080.

The previous prime is 165216241. The next prime is 165216253. The reversal of 165216252 is 252612561.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165216253) 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, 6883999 + ... + 6884022.

Almost surely, 2^165216252 is an apocalyptic number.

165216252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165216252 is an abundant number, since it is smaller than the sum of its proper divisors (220288364).

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

165216252 is a wasteful number, since it uses less digits than its factorization.

165216252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13768028 (or 13768026 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 165216252 is about 12853.6474200905. The cubic root of 165216252 is about 548.7201668773.

The spelling of 165216252 in words is "one hundred sixty-five million, two hundred sixteen thousand, two hundred fifty-two".