320405310431 has 8 divisors (see below), whose sum is σ = 322558435584. Its totient is φ = 318259143000.

The previous prime is 320405310409. The next prime is 320405310493. The reversal of 320405310431 is 134013504023.

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 320405310431 - 2⁶ = 320405310367 is a prime.

It is a super-2 number, since 2×320405310431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320405310431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320405310031) 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, 1647005 + ... + 1831238.

It is an arithmetic number, because the mean of its divisors is an integer number (40319804448).

Almost surely, 2^320405310431 is an apocalyptic number.

320405310431 is a deficient number, since it is larger than the sum of its proper divisors (2153125153).

320405310431 is a wasteful number, since it uses less digits than its factorization.

320405310431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478861.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 320405310431 its reverse (134013504023), we get a palindrome (454418814454).

The spelling of 320405310431 in words is "three hundred twenty billion, four hundred five million, three hundred ten thousand, four hundred thirty-one".