263236513 has 2 divisors, whose sum is σ = 263236514. Its totient is φ = 263236512.

The previous prime is 263236489. The next prime is 263236543. The reversal of 263236513 is 315632362.

263236513 = 11472² + 11473².

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131629729 + 131606784 = 11473^2 + 11472^2 .

It is a cyclic number.

It is not a de Polignac number, because 263236513 - 2⁵ = 263236481 is a prime.

It is not a weakly prime, because it can be changed into another prime (263236543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131618256 + 131618257.

It is an arithmetic number, because the mean of its divisors is an integer number (131618257).

Almost surely, 2^263236513 is an apocalyptic number.

263236513 is the 11473-rd centered square number.

It is an amenable number.

263236513 is a deficient number, since it is larger than the sum of its proper divisors (1).

263236513 is an equidigital number, since it uses as much as digits as its factorization.

263236513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 31.

The square root of 263236513 is about 16224.5651097341. The cubic root of 263236513 is about 640.8878570825.

Adding to 263236513 its reverse (315632362), we get a palindrome (578868875).

The spelling of 263236513 in words is "two hundred sixty-three million, two hundred thirty-six thousand, five hundred thirteen".