165420436 has 12 divisors (see below), whose sum is σ = 289948960. Its totient is φ = 82577880.

The previous prime is 165420407. The next prime is 165420443. The reversal of 165420436 is 634024561.

165420436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 165420398 and 165420407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30246 + ... + 35293.

Almost surely, 2^165420436 is an apocalyptic number.

It is an amenable number.

165420436 is a deficient number, since it is larger than the sum of its proper divisors (124528524).

165420436 is a wasteful number, since it uses less digits than its factorization.

165420436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66174 (or 66172 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 165420436 is about 12861.5876158428. The cubic root of 165420436 is about 548.9461207483.

Adding to 165420436 its reverse (634024561), we get a palindrome (799444997).

The spelling of 165420436 in words is "one hundred sixty-five million, four hundred twenty thousand, four hundred thirty-six".