165038217 has 8 divisors (see below), whose sum is σ = 227639040. Its totient is φ = 106231440.

The previous prime is 165038213. The next prime is 165038221. The reversal of 165038217 is 712830561.

It is an interprime number because it is at equal distance from previous prime (165038213) and next prime (165038221).

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

It is not a de Polignac number, because 165038217 - 2² = 165038213 is a prime.

It is a super-2 number, since 2×165038217² = 54475226141078178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165038213) 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, 948409 + ... + 948582.

It is an arithmetic number, because the mean of its divisors is an integer number (28454880).

Almost surely, 2^165038217 is an apocalyptic number.

It is an amenable number.

165038217 is a deficient number, since it is larger than the sum of its proper divisors (62600823).

165038217 is a wasteful number, since it uses less digits than its factorization.

165038217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897023.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 165038217 is about 12846.7200872441. The cubic root of 165038217 is about 548.5229980050.

Adding to 165038217 its reverse (712830561), we get a palindrome (877868778).

The spelling of 165038217 in words is "one hundred sixty-five million, thirty-eight thousand, two hundred seventeen".