165240219 has 8 divisors (see below), whose sum is σ = 221365312. Its totient is φ = 109637640.

The previous prime is 165240197. The next prime is 165240223. The reversal of 165240219 is 912042561.

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

It is not a de Polignac number, because 165240219 - 2¹⁶ = 165174683 is a prime.

It is a super-2 number, since 2×165240219² = 54608659950335922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165240259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129889 + ... + 131154.

It is an arithmetic number, because the mean of its divisors is an integer number (27670664).

Almost surely, 2^165240219 is an apocalyptic number.

165240219 is a deficient number, since it is larger than the sum of its proper divisors (56125093).

165240219 is a wasteful number, since it uses less digits than its factorization.

165240219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261257.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 165240219 is about 12854.5796897448. The cubic root of 165240219 is about 548.7466988523.

The spelling of 165240219 in words is "one hundred sixty-five million, two hundred forty thousand, two hundred nineteen".