165144442 has 8 divisors (see below), whose sum is σ = 250032096. Its totient is φ = 81800412.

The previous prime is 165144391. The next prime is 165144451. The reversal of 165144442 is 244441561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385638 + ... + 386065.

It is an arithmetic number, because the mean of its divisors is an integer number (31254012).

Almost surely, 2^165144442 is an apocalyptic number.

165144442 is a deficient number, since it is larger than the sum of its proper divisors (84887654).

165144442 is a wasteful number, since it uses less digits than its factorization.

165144442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771812.

The product of its digits is 15360, while the sum is 31.

The square root of 165144442 is about 12850.8537459579. The cubic root of 165144442 is about 548.6406563269.

The spelling of 165144442 in words is "one hundred sixty-five million, one hundred forty-four thousand, four hundred forty-two".