165237538 has 8 divisors (see below), whose sum is σ = 249154560. Its totient is φ = 82186020.

The previous prime is 165237511. The next prime is 165237559. The reversal of 165237538 is 835732561.

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

It is a self number, because there is not a number n which added to its sum of digits gives 165237538.

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 3 ways as a sum of consecutive naturals, for example, 215898 + ... + 216661.

It is an arithmetic number, because the mean of its divisors is an integer number (31144320).

Almost surely, 2^165237538 is an apocalyptic number.

165237538 is a deficient number, since it is larger than the sum of its proper divisors (83917022).

165237538 is a wasteful number, since it uses less digits than its factorization.

165237538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432752.

The product of its digits is 151200, while the sum is 40.

The square root of 165237538 is about 12854.4754074213. The cubic root of 165237538 is about 548.7437310561.

The spelling of 165237538 in words is "one hundred sixty-five million, two hundred thirty-seven thousand, five hundred thirty-eight".