263051 has 4 divisors (see below), whose sum is σ = 274512. Its totient is φ = 251592.

The previous prime is 263047. The next prime is 263063. The reversal of 263051 is 150362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 150362 = 2 ⋅75181.

It is a cyclic number.

It is not a de Polignac number, because 263051 - 2² = 263047 is a prime.

It is a d-powerful number, because it can be written as 2 + 6⁵ + 0 + 3¹¹ + 5⁷ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263071) 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 3 ways as a sum of consecutive naturals, for example, 5696 + ... + 5741.

It is an arithmetic number, because the mean of its divisors is an integer number (68628).

2²⁶³⁰⁵¹ is an apocalyptic number.

263051 is a deficient number, since it is larger than the sum of its proper divisors (11461).

263051 is a wasteful number, since it uses less digits than its factorization.

263051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11460.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 263051 is about 512.8849773585. The cubic root of 263051 is about 64.0737268843.

The spelling of 263051 in words is "two hundred sixty-three thousand, fifty-one".