431332321 has 8 divisors (see below), whose sum is σ = 493098624. Its totient is φ = 369602880.

The previous prime is 431332309. The next prime is 431332327. The reversal of 431332321 is 123233134.

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 431332321 - 2⁷ = 431332193 is a prime.

It is a super-2 number, since 2×431332321² = 372095142278494082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 431332292 and 431332301.

It is not an unprimeable number, because it can be changed into a prime (431332327) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23721 + ... + 37753.

It is an arithmetic number, because the mean of its divisors is an integer number (61637328).

Almost surely, 2^431332321 is an apocalyptic number.

It is an amenable number.

431332321 is a deficient number, since it is larger than the sum of its proper divisors (61766303).

431332321 is a wasteful number, since it uses less digits than its factorization.

431332321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18431.

The product of its digits is 1296, while the sum is 22.

The square root of 431332321 is about 20768.5416194782. The cubic root of 431332321 is about 755.5629741110.

Adding to 431332321 its reverse (123233134), we get a palindrome (554565455).

It can be divided in two parts, 43133 and 2321, that added together give a palindrome (45454).

The spelling of 431332321 in words is "four hundred thirty-one million, three hundred thirty-two thousand, three hundred twenty-one".