1331052303 has 8 divisors (see below), whose sum is σ = 2028270208. Its totient is φ = 760601304.

The previous prime is 1331052299. The next prime is 1331052341. The reversal of 1331052303 is 3032501331.

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

It is not a de Polignac number, because 1331052303 - 2² = 1331052299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 63383443 = 1331052303 / (1 + 3 + 3 + 1 + 0 + 5 + 2 + 3 + 0 + 3).

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 1331052303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331052403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31691701 + ... + 31691742.

It is an arithmetic number, because the mean of its divisors is an integer number (253533776).

Almost surely, 2^1331052303 is an apocalyptic number.

1331052303 is a deficient number, since it is larger than the sum of its proper divisors (697217905).

1331052303 is an equidigital number, since it uses as much as digits as its factorization.

1331052303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63383453.

The product of its (nonzero) digits is 810, while the sum is 21.

The square root of 1331052303 is about 36483.5895026791. The cubic root of 1331052303 is about 1100.0144083512.

Adding to 1331052303 its reverse (3032501331), we get a palindrome (4363553634).

The spelling of 1331052303 in words is "one billion, three hundred thirty-one million, fifty-two thousand, three hundred three".