263855 has 8 divisors (see below), whose sum is σ = 320112. Its totient is φ = 208768.

The previous prime is 263849. The next prime is 263863. The reversal of 263855 is 558362.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263855 is a prime.

It is a super-2 number, since 2×263855² = 139238922050, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁴ + 6³ + 8⁶ + 3⁶ + 5³ + 5⁴ .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332 + ... + 798.

It is an arithmetic number, because the mean of its divisors is an integer number (40014).

2²⁶³⁸⁵⁵ is an apocalyptic number.

263855 is a deficient number, since it is larger than the sum of its proper divisors (56257).

263855 is a wasteful number, since it uses less digits than its factorization.

263855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585.

The product of its digits is 7200, while the sum is 29.

The square root of 263855 is about 513.6681808327. The cubic root of 263855 is about 64.1389396895.

The spelling of 263855 in words is "two hundred sixty-three thousand, eight hundred fifty-five".