165197157 has 8 divisors (see below), whose sum is σ = 221944800. Its totient is φ = 109290480.

The previous prime is 165197147. The next prime is 165197173. The reversal of 165197157 is 751791561.

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

It is not a de Polignac number, because 165197157 - 2⁶ = 165197093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165197107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209782 + ... + 210567.

It is an arithmetic number, because the mean of its divisors is an integer number (27743100).

Almost surely, 2^165197157 is an apocalyptic number.

It is an amenable number.

165197157 is a deficient number, since it is larger than the sum of its proper divisors (56747643).

165197157 is a wasteful number, since it uses less digits than its factorization.

165197157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420483.

The product of its digits is 66150, while the sum is 42.

The square root of 165197157 is about 12852.9046133549. The cubic root of 165197157 is about 548.6990264727.

The spelling of 165197157 in words is "one hundred sixty-five million, one hundred ninety-seven thousand, one hundred fifty-seven".