1323215453 has 16 divisors (see below), whose sum is σ = 1544716800. Its totient is φ = 1133003088.

The previous prime is 1323215431. The next prime is 1323215473. The reversal of 1323215453 is 3545123231.

It is a happy number.

It is not a de Polignac number, because 1323215453 - 2¹⁰ = 1323214429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323215473) 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 15 ways as a sum of consecutive naturals, for example, 541751 + ... + 544187.

It is an arithmetic number, because the mean of its divisors is an integer number (96544800).

Almost surely, 2^1323215453 is an apocalyptic number.

It is an amenable number.

1323215453 is a deficient number, since it is larger than the sum of its proper divisors (221501347).

1323215453 is an equidigital number, since it uses as much as digits as its factorization.

1323215453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041 (or 4027 counting only the distinct ones).

The product of its digits is 10800, while the sum is 29.

The square root of 1323215453 is about 36376.0285490321. The cubic root of 1323215453 is about 1097.8513022434.

Adding to 1323215453 its reverse (3545123231), we get a palindrome (4868338684).

The spelling of 1323215453 in words is "one billion, three hundred twenty-three million, two hundred fifteen thousand, four hundred fifty-three".