165312012 has 24 divisors (see below), whose sum is σ = 408418416. Its totient is φ = 51862528.

The previous prime is 165312011. The next prime is 165312061. The reversal of 165312012 is 210213561.

165312012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×165312012² = 54656122622976288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165312012.

It is not an unprimeable number, because it can be changed into a prime (165312011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404973 + ... + 405380.

It is an arithmetic number, because the mean of its divisors is an integer number (17017434).

Almost surely, 2^165312012 is an apocalyptic number.

165312012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165312012 is an abundant number, since it is smaller than the sum of its proper divisors (243106404).

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

165312012 is a wasteful number, since it uses less digits than its factorization.

165312012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810377 (or 810375 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 165312012 is about 12857.3718931981. The cubic root of 165312012 is about 548.8261598693.

Adding to 165312012 its reverse (210213561), we get a palindrome (375525573).

The spelling of 165312012 in words is "one hundred sixty-five million, three hundred twelve thousand, twelve".