165216542 has 8 divisors (see below), whose sum is σ = 247903032. Its totient is φ = 82582200.

The previous prime is 165216539. The next prime is 165216559. The reversal of 165216542 is 245612561.

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

It is a junction number, because it is equal to n+sod(n) for n = 165216499 and 165216508.

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, 3809 + ... + 18572.

It is an arithmetic number, because the mean of its divisors is an integer number (30987879).

Almost surely, 2^165216542 is an apocalyptic number.

165216542 is a deficient number, since it is larger than the sum of its proper divisors (82686490).

165216542 is a wasteful number, since it uses less digits than its factorization.

165216542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26074.

The product of its digits is 14400, while the sum is 32.

The square root of 165216542 is about 12853.6587009303. The cubic root of 165216542 is about 548.7204879288.

The spelling of 165216542 in words is "one hundred sixty-five million, two hundred sixteen thousand, five hundred forty-two".