158217165 has 16 divisors (see below), whose sum is σ = 281275200. Its totient is φ = 84382416.

The previous prime is 158217131. The next prime is 158217187. The reversal of 158217165 is 561712851.

158217165 is a `hidden beast` number, since 1 + 582 + 1 + 71 + 6 + 5 = 666.

It is not a de Polignac number, because 158217165 - 2²³ = 149828557 is a prime.

It is a Curzon number.

It is a congruent number.

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, 585855 + ... + 586124.

It is an arithmetic number, because the mean of its divisors is an integer number (17579700).

Almost surely, 2^158217165 is an apocalyptic number.

158217165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

158217165 is a deficient number, since it is larger than the sum of its proper divisors (123058035).

158217165 is a wasteful number, since it uses less digits than its factorization.

158217165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171993 (or 1171987 counting only the distinct ones).

The product of its digits is 16800, while the sum is 36.

The square root of 158217165 is about 12578.4404836212. The cubic root of 158217165 is about 540.8595877472.

The spelling of 158217165 in words is "one hundred fifty-eight million, two hundred seventeen thousand, one hundred sixty-five".