1331303113 has 4 divisors (see below), whose sum is σ = 1521489280. Its totient is φ = 1141116948.

The previous prime is 1331303093. The next prime is 1331303137. The reversal of 1331303113 is 3113031331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1331303113 - 2²¹ = 1329205961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331303173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95093073 + ... + 95093086.

It is an arithmetic number, because the mean of its divisors is an integer number (380372320).

Almost surely, 2^1331303113 is an apocalyptic number.

It is an amenable number.

1331303113 is a deficient number, since it is larger than the sum of its proper divisors (190186167).

1331303113 is an equidigital number, since it uses as much as digits as its factorization.

1331303113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190186166.

The product of its (nonzero) digits is 243, while the sum is 19.

The square root of 1331303113 is about 36487.0266396153. The cubic root of 1331303113 is about 1100.0834958659.

Adding to 1331303113 its reverse (3113031331), we get a palindrome (4444334444).

The spelling of 1331303113 in words is "one billion, three hundred thirty-one million, three hundred three thousand, one hundred thirteen".