165612212 has 24 divisors (see below), whose sum is σ = 292585440. Its totient is φ = 82020960.

The previous prime is 165612197. The next prime is 165612229. The reversal of 165612212 is 212216561.

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, 267239 + ... + 267857.

It is an arithmetic number, because the mean of its divisors is an integer number (12191060).

Almost surely, 2^165612212 is an apocalyptic number.

It is an amenable number.

165612212 is a deficient number, since it is larger than the sum of its proper divisors (126973228).

165612212 is a wasteful number, since it uses less digits than its factorization.

165612212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151 (or 1149 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 165612212 is about 12869.0408344989. The cubic root of 165612212 is about 549.1581744249.

Adding to 165612212 its reverse (212216561), we get a palindrome (377828773).

The spelling of 165612212 in words is "one hundred sixty-five million, six hundred twelve thousand, two hundred twelve".