263081 has 16 divisors (see below), whose sum is σ = 336000. Its totient is φ = 204624.

The previous prime is 263077. The next prime is 263083. The reversal of 263081 is 180362.

It is not a de Polignac number, because 263081 - 2² = 263077 is a prime.

It is a super-2 number, since 2×263081² = 138423225122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (263083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4430 + ... + 4488.

It is an arithmetic number, because the mean of its divisors is an integer number (21000).

2²⁶³⁰⁸¹ is an apocalyptic number.

It is an amenable number.

263081 is a deficient number, since it is larger than the sum of its proper divisors (72919).

263081 is an equidigital number, since it uses as much as digits as its factorization.

263081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 263081 is about 512.9142228482. The cubic root of 263081 is about 64.0761625827.

The spelling of 263081 in words is "two hundred sixty-three thousand, eighty-one".