263340531 has 8 divisors (see below), whose sum is σ = 390134160. Its totient is φ = 175560336.

The previous prime is 263340487. The next prime is 263340533. The reversal of 263340531 is 135043362.

It is a happy number.

It is not a de Polignac number, because 263340531 - 2¹³ = 263332339 is a prime.

It is a super-2 number, since 2×263340531² = 138696470534723922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 9753353 = 263340531 / (2 + 6 + 3 + 3 + 4 + 0 + 5 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 263340495 and 263340504.

It is not an unprimeable number, because it can be changed into a prime (263340533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4876650 + ... + 4876703.

It is an arithmetic number, because the mean of its divisors is an integer number (48766770).

Almost surely, 2^263340531 is an apocalyptic number.

263340531 is a deficient number, since it is larger than the sum of its proper divisors (126793629).

263340531 is an equidigital number, since it uses as much as digits as its factorization.

263340531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9753362 (or 9753356 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 263340531 is about 16227.7703644093. The cubic root of 263340531 is about 640.9722616528.

Adding to 263340531 its reverse (135043362), we get a palindrome (398383893).

The spelling of 263340531 in words is "two hundred sixty-three million, three hundred forty thousand, five hundred thirty-one".