1431143321 has 4 divisors (see below), whose sum is σ = 1432870500. Its totient is φ = 1429416144.

The previous prime is 1431143299. The next prime is 1431143323. The reversal of 1431143321 is 1233411341.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 705433600 + 725709721 = 26560^2 + 26939^2 .

It is a cyclic number.

It is not a de Polignac number, because 1431143321 - 2⁶ = 1431143257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1431143323) 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, 862346 + ... + 864003.

It is an arithmetic number, because the mean of its divisors is an integer number (358217625).

Almost surely, 2^1431143321 is an apocalyptic number.

It is an amenable number.

1431143321 is a deficient number, since it is larger than the sum of its proper divisors (1727179).

1431143321 is an equidigital number, since it uses as much as digits as its factorization.

1431143321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727178.

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

The square root of 1431143321 is about 37830.4549404313. The cubic root of 1431143321 is about 1126.9233458791.

Adding to 1431143321 its reverse (1233411341), we get a palindrome (2664554662).

The spelling of 1431143321 in words is "one billion, four hundred thirty-one million, one hundred forty-three thousand, three hundred twenty-one".