1431344321 has 8 divisors (see below), whose sum is σ = 1587065088. Its totient is φ = 1279890000.

The previous prime is 1431344287. The next prime is 1431344339. The reversal of 1431344321 is 1234431341.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1431344321 - 2¹⁰ = 1431343297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1431344381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1065905 + ... + 1067246.

It is an arithmetic number, because the mean of its divisors is an integer number (198383136).

Almost surely, 2^1431344321 is an apocalyptic number.

1431344321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1431344321 is a deficient number, since it is larger than the sum of its proper divisors (155720767).

1431344321 is a wasteful number, since it uses less digits than its factorization.

1431344321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133223.

The product of its digits is 3456, while the sum is 26.

The square root of 1431344321 is about 37833.1114369411. Note that the first 3 decimals coincide. The cubic root of 1431344321 is about 1126.9761011333.

Adding to 1431344321 its reverse (1234431341), we get a palindrome (2665775662).

The spelling of 1431344321 in words is "one billion, four hundred thirty-one million, three hundred forty-four thousand, three hundred twenty-one".