263530 has 24 divisors (see below), whose sum is σ = 507492. Its totient is φ = 98496.

The previous prime is 263521. The next prime is 263533. The reversal of 263530 is 35362.

It can be written as a sum of positive squares in 2 ways, for example, as 263169 + 361 = 513^2 + 19^2 .

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 263498 and 263507.

It is not an unprimeable number, because it can be changed into a prime (263533) 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 11 ways as a sum of consecutive naturals, for example, 3574 + ... + 3646.

2²⁶³⁵³⁰ is an apocalyptic number.

263530 is a deficient number, since it is larger than the sum of its proper divisors (243962).

263530 is a wasteful number, since it uses less digits than its factorization.

263530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 263530 is about 513.3517312720. The cubic root of 263530 is about 64.1125947654.

Adding to 263530 its reverse (35362), we get a palindrome (298892).

The spelling of 263530 in words is "two hundred sixty-three thousand, five hundred thirty".