165400212 has 24 divisors (see below), whose sum is σ = 396365536. Its totient is φ = 53643168.

The previous prime is 165400211. The next prime is 165400217. The reversal of 165400212 is 212004561.

165400212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165400211) 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, 185818 + ... + 186705.

Almost surely, 2^165400212 is an apocalyptic number.

165400212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165400212 is an abundant number, since it is smaller than the sum of its proper divisors (230965324).

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

165400212 is a wasteful number, since it uses less digits than its factorization.

165400212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372567 (or 372565 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 165400212 is about 12860.8013747200. The cubic root of 165400212 is about 548.9237487869.

Adding to 165400212 its reverse (212004561), we get a palindrome (377404773).

The spelling of 165400212 in words is "one hundred sixty-five million, four hundred thousand, two hundred twelve".