1431321243 has 64 divisors (see below), whose sum is σ = 2279424000. Its totient is φ = 789264000.

The previous prime is 1431321223. The next prime is 1431321271. The reversal of 1431321243 is 3421231341.

It is a happy number.

It is not a de Polignac number, because 1431321243 - 2⁹ = 1431320731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1431321223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4101033 + ... + 4101381.

It is an arithmetic number, because the mean of its divisors is an integer number (35616000).

Almost surely, 2^1431321243 is an apocalyptic number.

1431321243 is a deficient number, since it is larger than the sum of its proper divisors (848102757).

1431321243 is a wasteful number, since it uses less digits than its factorization.

1431321243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624.

The product of its digits is 1728, while the sum is 24.

The square root of 1431321243 is about 37832.8064383281. The cubic root of 1431321243 is about 1126.9700442412.

Adding to 1431321243 its reverse (3421231341), we get a palindrome (4852552584).

The spelling of 1431321243 in words is "one billion, four hundred thirty-one million, three hundred twenty-one thousand, two hundred forty-three".