263815313 has 8 divisors (see below), whose sum is σ = 278380800. Its totient is φ = 249507808.

The previous prime is 263815309. The next prime is 263815351. The reversal of 263815313 is 313518362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 263815313 - 2² = 263815309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 263815313.

It is not an unprimeable number, because it can be changed into a prime (263815213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62393 + ... + 66486.

It is an arithmetic number, because the mean of its divisors is an integer number (34797600).

Almost surely, 2^263815313 is an apocalyptic number.

263815313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

263815313 is a deficient number, since it is larger than the sum of its proper divisors (14565487).

263815313 is a wasteful number, since it uses less digits than its factorization.

263815313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128991.

The product of its digits is 12960, while the sum is 32.

The square root of 263815313 is about 16242.3924653975. The cubic root of 263815313 is about 641.3572376945.

The spelling of 263815313 in words is "two hundred sixty-three million, eight hundred fifteen thousand, three hundred thirteen".