165220612 has 6 divisors (see below), whose sum is σ = 289136078. Its totient is φ = 82610304.

The previous prime is 165220589. The next prime is 165220613. The reversal of 165220612 is 216022561.

165220612 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 138862656 + 26357956 = 11784^2 + 5134^2 .

It is not an unprimeable number, because it can be changed into a prime (165220613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20652573 + ... + 20652580.

Almost surely, 2^165220612 is an apocalyptic number.

It is an amenable number.

165220612 is a deficient number, since it is larger than the sum of its proper divisors (123915466).

165220612 is a wasteful number, since it uses less digits than its factorization.

165220612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41305157 (or 41305155 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 165220612 is about 12853.8170206363. The cubic root of 165220612 is about 548.7249936803.

The spelling of 165220612 in words is "one hundred sixty-five million, two hundred twenty thousand, six hundred twelve".