165044434 has 16 divisors (see below), whose sum is σ = 261789696. Its totient is φ = 77911200.

The previous prime is 165044371. The next prime is 165044441. The reversal of 165044434 is 434440561.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 165044396 and 165044405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29922 + ... + 35005.

It is an arithmetic number, because the mean of its divisors is an integer number (16361856).

Almost surely, 2^165044434 is an apocalyptic number.

165044434 is a deficient number, since it is larger than the sum of its proper divisors (96745262).

165044434 is a wasteful number, since it uses less digits than its factorization.

165044434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65001.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 165044434 is about 12846.9620533416. The cubic root of 165044434 is about 548.5298855505.

Adding to 165044434 its reverse (434440561), we get a palindrome (599484995).

The spelling of 165044434 in words is "one hundred sixty-five million, forty-four thousand, four hundred thirty-four".