263203481 has 2 divisors, whose sum is σ = 263203482. Its totient is φ = 263203480.

The previous prime is 263203453. The next prime is 263203487. The reversal of 263203481 is 184302362.

263203481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239971081 + 23232400 = 15491^2 + 4820^2 .

It is a cyclic number.

It is not a de Polignac number, because 263203481 - 2¹⁴ = 263187097 is a prime.

It is a super-2 number, since 2×263203481² = 138552144821034722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (263203487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131601740 + 131601741.

It is an arithmetic number, because the mean of its divisors is an integer number (131601741).

Almost surely, 2^263203481 is an apocalyptic number.

It is an amenable number.

263203481 is a deficient number, since it is larger than the sum of its proper divisors (1).

263203481 is an equidigital number, since it uses as much as digits as its factorization.

263203481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 263203481 is about 16223.5471152273. The cubic root of 263203481 is about 640.8610488799.

The spelling of 263203481 in words is "two hundred sixty-three million, two hundred three thousand, four hundred eighty-one".