165212 has 12 divisors (see below), whose sum is σ = 292656. Its totient is φ = 81600.

The previous prime is 165211. The next prime is 165229. The reversal of 165212 is 212561.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165211) 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, 212 + ... + 612.

It is an arithmetic number, because the mean of its divisors is an integer number (24388).

2¹⁶⁵²¹² is an apocalyptic number.

It is an amenable number.

165212 is a deficient number, since it is larger than the sum of its proper divisors (127444).

165212 is a wasteful number, since it uses less digits than its factorization.

165212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508 (or 506 counting only the distinct ones).

The product of its digits is 120, while the sum is 17.

The square root of 165212 is about 406.4627904249. The cubic root of 165212 is about 54.8715459556.

Adding to 165212 its reverse (212561), we get a palindrome (377773).

It can be divided in two parts, 165 and 212, that multiplied together give a triangular number (34980 = T₂₆₄).

The spelling of 165212 in words is "one hundred sixty-five thousand, two hundred twelve".