42165218 has 8 divisors (see below), whose sum is σ = 66576720. Its totient is φ = 19972980.

The previous prime is 42165197. The next prime is 42165229. The reversal of 42165218 is 81256124.

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, 554768 + ... + 554843.

It is an arithmetic number, because the mean of its divisors is an integer number (8322090).

Almost surely, 2^42165218 is an apocalyptic number.

42165218 is a deficient number, since it is larger than the sum of its proper divisors (24411502).

42165218 is a wasteful number, since it uses less digits than its factorization.

42165218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109632.

The product of its digits is 3840, while the sum is 29.

The square root of 42165218 is about 6493.4750326770. The cubic root of 42165218 is about 348.0578635011.

The spelling of 42165218 in words is "forty-two million, one hundred sixty-five thousand, two hundred eighteen".