1322431509 has 16 divisors (see below), whose sum is σ = 2037778560. Its totient is φ = 747183360.

The previous prime is 1322431477. The next prime is 1322431519. The reversal of 1322431509 is 9051342231.

It is not a de Polignac number, because 1322431509 - 2⁵ = 1322431477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322431519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351912 + ... + 355649.

It is an arithmetic number, because the mean of its divisors is an integer number (127361160).

Almost surely, 2^1322431509 is an apocalyptic number.

It is an amenable number.

1322431509 is a deficient number, since it is larger than the sum of its proper divisors (715347051).

1322431509 is an equidigital number, since it uses as much as digits as its factorization.

1322431509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707660.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1322431509 is about 36365.2513947037. The cubic root of 1322431509 is about 1097.6344506941.

The spelling of 1322431509 in words is "one billion, three hundred twenty-two million, four hundred thirty-one thousand, five hundred nine".