431330331421 has 16 divisors (see below), whose sum is σ = 477091817280. Its totient is φ = 386662792320.

The previous prime is 431330331407. The next prime is 431330331431. The reversal of 431330331421 is 124133033134.

It is a cyclic number.

It is not a de Polignac number, because 431330331421 - 2²¹ = 431328234269 is a prime.

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 431330331421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431330331431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3789486 + ... + 3901648.

It is an arithmetic number, because the mean of its divisors is an integer number (29818238580).

Almost surely, 2^431330331421 is an apocalyptic number.

It is an amenable number.

431330331421 is a deficient number, since it is larger than the sum of its proper divisors (45761485859).

431330331421 is a wasteful number, since it uses less digits than its factorization.

431330331421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117036.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 431330331421 its reverse (124133033134), we get a palindrome (555463364555).

The spelling of 431330331421 in words is "four hundred thirty-one billion, three hundred thirty million, three hundred thirty-one thousand, four hundred twenty-one".