263642313 has 16 divisors (see below), whose sum is σ = 383991552. Its totient is φ = 159570000.

The previous prime is 263642293. The next prime is 263642371. The reversal of 263642313 is 313246362.

It is not a de Polignac number, because 263642313 - 2¹⁰ = 263641289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (263642213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21838 + ... + 31688.

It is an arithmetic number, because the mean of its divisors is an integer number (23999472).

Almost surely, 2^263642313 is an apocalyptic number.

It is an amenable number.

263642313 is a deficient number, since it is larger than the sum of its proper divisors (120349239).

263642313 is a wasteful number, since it uses less digits than its factorization.

263642313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10676.

The product of its digits is 15552, while the sum is 30.

The square root of 263642313 is about 16237.0660219142. The cubic root of 263642313 is about 641.2170145172.

Adding to 263642313 its reverse (313246362), we get a palindrome (576888675).

The spelling of 263642313 in words is "two hundred sixty-three million, six hundred forty-two thousand, three hundred thirteen".