165228012 has 30 divisors (see below), whose sum is σ = 431939508. Its totient is φ = 55075896.

The previous prime is 165228001. The next prime is 165228013. The reversal of 165228012 is 210822561.

It is a happy number.

165228012 is a `hidden beast` number, since 1 + 652 + 2 + 8 + 0 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (165228013) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 254658 + ... + 255305.

Almost surely, 2^165228012 is an apocalyptic number.

165228012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165228012 is an abundant number, since it is smaller than the sum of its proper divisors (266711496).

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

165228012 is a wasteful number, since it uses less digits than its factorization.

165228012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509979 (or 509968 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 165228012 is about 12854.1048696516. The cubic root of 165228012 is about 548.7331857662.

The spelling of 165228012 in words is "one hundred sixty-five million, two hundred twenty-eight thousand, twelve".