165198215 has 32 divisors (see below), whose sum is σ = 247672320. Its totient is φ = 102985344.

The previous prime is 165198211. The next prime is 165198223. The reversal of 165198215 is 512891561.

It is not a de Polignac number, because 165198215 - 2² = 165198211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165198211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27776 + ... + 33194.

It is an arithmetic number, because the mean of its divisors is an integer number (7739760).

Almost surely, 2^165198215 is an apocalyptic number.

165198215 is a deficient number, since it is larger than the sum of its proper divisors (82474105).

165198215 is a wasteful number, since it uses less digits than its factorization.

165198215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5511.

The product of its digits is 21600, while the sum is 38.

The square root of 165198215 is about 12852.9457713008. The cubic root of 165198215 is about 548.7001978454.

The spelling of 165198215 in words is "one hundred sixty-five million, one hundred ninety-eight thousand, two hundred fifteen".