1331210323 has 4 divisors (see below), whose sum is σ = 1335160840. Its totient is φ = 1327259808.

The previous prime is 1331210299. The next prime is 1331210329. The reversal of 1331210323 is 3230121331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3230121331 = 8221 ⋅392911.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331210323 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 1331210323.

It is not an unprimeable number, because it can be changed into a prime (1331210329) 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, 1974753 + ... + 1975426.

It is an arithmetic number, because the mean of its divisors is an integer number (333790210).

Almost surely, 2^1331210323 is an apocalyptic number.

1331210323 is a deficient number, since it is larger than the sum of its proper divisors (3950517).

1331210323 is an equidigital number, since it uses as much as digits as its factorization.

1331210323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3950516.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1331210323 is about 36485.7550696159. The cubic root of 1331210323 is about 1100.0579371688.

Adding to 1331210323 its reverse (3230121331), we get a palindrome (4561331654).

The spelling of 1331210323 in words is "one billion, three hundred thirty-one million, two hundred ten thousand, three hundred twenty-three".