165198715 has 16 divisors (see below), whose sum is σ = 216534240. Its totient is φ = 119992320.

The previous prime is 165198701. The next prime is 165198727. The reversal of 165198715 is 517891561.

It is a de Polignac number, because none of the positive numbers 2^k-165198715 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60091 + ... + 62779.

It is an arithmetic number, because the mean of its divisors is an integer number (13533390).

Almost surely, 2^165198715 is an apocalyptic number.

165198715 is a deficient number, since it is larger than the sum of its proper divisors (51335525).

165198715 is a wasteful number, since it uses less digits than its factorization.

165198715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822.

The product of its digits is 75600, while the sum is 43.

The square root of 165198715 is about 12852.9652220801. The cubic root of 165198715 is about 548.7007514224.

The spelling of 165198715 in words is "one hundred sixty-five million, one hundred ninety-eight thousand, seven hundred fifteen".