1331303313 has 8 divisors (see below), whose sum is σ = 1775360608. Its totient is φ = 887390784.

The previous prime is 1331303291. The next prime is 1331303329. The reversal of 1331303313 is 3133031331.

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

It is not a de Polignac number, because 1331303313 - 2⁶ = 1331303249 is a prime.

It is a super-2 number, since 2×1331303313² = 3544737022409551938, which contains 22 as substring.

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 1331303313.

It is not an unprimeable number, because it can be changed into a prime (1331303353) 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, 12520 + ... + 53097.

It is an arithmetic number, because the mean of its divisors is an integer number (221920076).

Almost surely, 2^1331303313 is an apocalyptic number.

It is an amenable number.

1331303313 is a deficient number, since it is larger than the sum of its proper divisors (444057295).

1331303313 is an equidigital number, since it uses as much as digits as its factorization.

1331303313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72383.

The product of its (nonzero) digits is 729, while the sum is 21.

The square root of 1331303313 is about 36487.0293803154. The cubic root of 1331303313 is about 1100.0835509540.

Adding to 1331303313 its reverse (3133031331), we get a palindrome (4464334644).

The spelling of 1331303313 in words is "one billion, three hundred thirty-one million, three hundred three thousand, three hundred thirteen".