165311642 has 8 divisors (see below), whose sum is σ = 248030100. Its totient is φ = 82634944.

The previous prime is 165311599. The next prime is 165311659. The reversal of 165311642 is 246113561.

It is a happy number.

165311642 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 136913401 + 28398241 = 11701^2 + 5329^2 .

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

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, 2834 + ... + 18402.

Almost surely, 2^165311642 is an apocalyptic number.

165311642 is a deficient number, since it is larger than the sum of its proper divisors (82718458).

165311642 is a wasteful number, since it uses less digits than its factorization.

165311642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20880.

The product of its digits is 4320, while the sum is 29.

The square root of 165311642 is about 12857.3575045575. The cubic root of 165311642 is about 548.8257504095.

The spelling of 165311642 in words is "one hundred sixty-five million, three hundred eleven thousand, six hundred forty-two".