1323311144 has 16 divisors (see below), whose sum is σ = 2627162100. Its totient is φ = 622734592.

The previous prime is 1323311137. The next prime is 1323311147. The reversal of 1323311144 is 4411133231.

It can be written as a sum of positive squares in 2 ways, for example, as 1270922500 + 52388644 = 35650^2 + 7238^2 .

It is not an unprimeable number, because it can be changed into a prime (1323311147) 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, 4864979 + ... + 4865250.

Almost surely, 2^1323311144 is an apocalyptic number.

It is an amenable number.

1323311144 is a deficient number, since it is larger than the sum of its proper divisors (1303850956).

1323311144 is a wasteful number, since it uses less digits than its factorization.

1323311144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9730252 (or 9730248 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 1323311144 is about 36377.3438282676. The cubic root of 1323311144 is about 1097.8777660508.

Adding to 1323311144 its reverse (4411133231), we get a palindrome (5734444375).

The spelling of 1323311144 in words is "one billion, three hundred twenty-three million, three hundred eleven thousand, one hundred forty-four".