165213212 has 12 divisors (see below), whose sum is σ = 290324496. Its totient is φ = 82263360.

The previous prime is 165213199. The next prime is 165213233. The reversal of 165213212 is 212312561.

165213212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84728 + ... + 86655.

It is an arithmetic number, because the mean of its divisors is an integer number (24193708).

Almost surely, 2^165213212 is an apocalyptic number.

It is an amenable number.

165213212 is a deficient number, since it is larger than the sum of its proper divisors (125111284).

165213212 is a wasteful number, since it uses less digits than its factorization.

165213212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171628 (or 171626 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 165213212 is about 12853.5291651748. The cubic root of 165213212 is about 548.7168013498.

Adding to 165213212 its reverse (212312561), we get a palindrome (377525773).

The spelling of 165213212 in words is "one hundred sixty-five million, two hundred thirteen thousand, two hundred twelve".