165121333 has 8 divisors (see below), whose sum is σ = 181959008. Its totient is φ = 148874544.

The previous prime is 165121291. The next prime is 165121337. The reversal of 165121333 is 333121561.

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

It is not a de Polignac number, because 165121333 - 2²¹ = 163024181 is a prime.

It is a super-2 number, since 2×165121333² = 54530109223393778, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165121298 and 165121307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165121337) 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, 147135 + ... + 148252.

It is an arithmetic number, because the mean of its divisors is an integer number (22744876).

Almost surely, 2^165121333 is an apocalyptic number.

165121333 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

165121333 is a deficient number, since it is larger than the sum of its proper divisors (16837675).

165121333 is a wasteful number, since it uses less digits than its factorization.

165121333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295443.

The product of its digits is 1620, while the sum is 25.

The square root of 165121333 is about 12849.9545913595. The cubic root of 165121333 is about 548.6150643296.

Adding to 165121333 its reverse (333121561), we get a palindrome (498242894).

The spelling of 165121333 in words is "one hundred sixty-five million, one hundred twenty-one thousand, three hundred thirty-three".