165821342 has 8 divisors (see below), whose sum is σ = 249359736. Its totient is φ = 82701432.

The previous prime is 165821323. The next prime is 165821351. The reversal of 165821342 is 243128561.

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 = 165821299 and 165821308.

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, 103628 + ... + 105215.

It is an arithmetic number, because the mean of its divisors is an integer number (31169967).

Almost surely, 2^165821342 is an apocalyptic number.

165821342 is a deficient number, since it is larger than the sum of its proper divisors (83538394).

165821342 is a wasteful number, since it uses less digits than its factorization.

165821342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209242.

The product of its digits is 11520, while the sum is 32.

The square root of 165821342 is about 12877.1635852000. The cubic root of 165821342 is about 549.3892305377.

The spelling of 165821342 in words is "one hundred sixty-five million, eight hundred twenty-one thousand, three hundred forty-two".