1323545520 has 80 divisors (see below), whose sum is σ = 4475999232. Its totient is φ = 320858880.

The previous prime is 1323545513. The next prime is 1323545551. The reversal of 1323545520 is 255453231.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248032 + ... + 253311.

Almost surely, 2^1323545520 is an apocalyptic number.

1323545520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323545520 is an abundant number, since it is smaller than the sum of its proper divisors (3152453712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1323545520 is a wasteful number, since it uses less digits than its factorization.

1323545520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501370 (or 501364 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 1323545520 is about 36380.5651412949. The cubic root of 1323545520 is about 1097.9425784749.

Adding to 1323545520 its reverse (255453231), we get a palindrome (1578998751).

The spelling of 1323545520 in words is "one billion, three hundred twenty-three million, five hundred forty-five thousand, five hundred twenty".