263165 has 16 divisors (see below), whose sum is σ = 369408. Its totient is φ = 176256.

The previous prime is 263129. The next prime is 263167. The reversal of 263165 is 561362.

It is a cyclic number.

It is not a de Polignac number, because 263165 - 2⁶ = 263101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 263165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2504 + ... + 2606.

It is an arithmetic number, because the mean of its divisors is an integer number (23088).

2²⁶³¹⁶⁵ is an apocalyptic number.

It is an amenable number.

263165 is a deficient number, since it is larger than the sum of its proper divisors (106243).

263165 is a wasteful number, since it uses less digits than its factorization.

263165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188.

The product of its digits is 1080, while the sum is 23.

The square root of 263165 is about 512.9961013497. The cubic root of 263165 is about 64.0829815534.

The spelling of 263165 in words is "two hundred sixty-three thousand, one hundred sixty-five".