321043023430431 has 32 divisors (see below), whose sum is σ = 432871989788160. Its totient is φ = 211627741041024.

The previous prime is 321043023430379. The next prime is 321043023430447. The reversal of 321043023430431 is 134034320340123.

It is a happy number.

It is not a de Polignac number, because 321043023430431 - 2³¹ = 321040875946783 is a prime.

It is a super-2 number, since 2×321043023430431² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321043023430392 and 321043023430401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321043023430331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4650808225 + ... + 4650877253.

It is an arithmetic number, because the mean of its divisors is an integer number (13527249680880).

Almost surely, 2^{321043023430431} is an apocalyptic number.

321043023430431 is a deficient number, since it is larger than the sum of its proper divisors (111828966357729).

321043023430431 is a wasteful number, since it uses less digits than its factorization.

321043023430431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91855.

The product of its (nonzero) digits is 62208, while the sum is 33.

Adding to 321043023430431 its reverse (134034320340123), we get a palindrome (455077343770554).

The spelling of 321043023430431 in words is "three hundred twenty-one trillion, forty-three billion, twenty-three million, four hundred thirty thousand, four hundred thirty-one".