1331232303 has 4 divisors (see below), whose sum is σ = 1774976408. Its totient is φ = 887488200.

The previous prime is 1331232271. The next prime is 1331232347. The reversal of 1331232303 is 3032321331.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1331232303 - 2⁵ = 1331232271 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 1331232303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331232703) 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, 221872048 + ... + 221872053.

It is an arithmetic number, because the mean of its divisors is an integer number (443744102).

Almost surely, 2^1331232303 is an apocalyptic number.

1331232303 is a deficient number, since it is larger than the sum of its proper divisors (443744105).

1331232303 is an equidigital number, since it uses as much as digits as its factorization.

1331232303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443744104.

The product of its (nonzero) digits is 972, while the sum is 21.

The square root of 1331232303 is about 36486.0562818181. The cubic root of 1331232303 is about 1100.0639915941.

Adding to 1331232303 its reverse (3032321331), we get a palindrome (4363553634).

The spelling of 1331232303 in words is "one billion, three hundred thirty-one million, two hundred thirty-two thousand, three hundred three".