431321872812 has 192 divisors, whose sum is σ = 1064590732800. Its totient is φ = 135737118720.

The previous prime is 431321872789. The next prime is 431321872853. The reversal of 431321872812 is 218278123134.

It is a happy number.

It is a super-2 number, since 2×431321872812² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1883501514 + ... + 1883501742.

It is an arithmetic number, because the mean of its divisors is an integer number (5544743400).

Almost surely, 2^431321872812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 431321872812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (532295366400).

431321872812 is an abundant number, since it is smaller than the sum of its proper divisors (633268859988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

431321872812 is a wasteful number, since it uses less digits than its factorization.

431321872812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816 (or 814 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

Adding to 431321872812 its reverse (218278123134), we get a palindrome (649599995946).

The spelling of 431321872812 in words is "four hundred thirty-one billion, three hundred twenty-one million, eight hundred seventy-two thousand, eight hundred twelve".