163365 has 8 divisors (see below), whose sum is σ = 261408. Its totient is φ = 87120.

The previous prime is 163363. The next prime is 163367. The reversal of 163365 is 563361.

It is an interprime number because it is at equal distance from previous prime (163363) and next prime (163367).

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

It is not a de Polignac number, because 163365 - 2¹ = 163363 is a prime.

163365 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163363) 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, 5431 + ... + 5460.

It is an arithmetic number, because the mean of its divisors is an integer number (32676).

2¹⁶³³⁶⁵ is an apocalyptic number.

163365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163365 is a deficient number, since it is larger than the sum of its proper divisors (98043).

163365 is a wasteful number, since it uses less digits than its factorization.

163365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10899.

The product of its digits is 1620, while the sum is 24.

The square root of 163365 is about 404.1843638737. The cubic root of 163365 is about 54.6662989928. Note that the first 3 decimals are identical.

It can be divided in two parts, 163 and 365, that multiplied together give a palindrome (59495).

The spelling of 163365 in words is "one hundred sixty-three thousand, three hundred sixty-five".