21431403414231 has 16 divisors (see below), whose sum is σ = 30129886448640. Its totient is φ = 13512797516160.

The previous prime is 21431403414203. The next prime is 21431403414251. The reversal of 21431403414231 is 13241430413412.

It is a happy number.

It is not a de Polignac number, because 21431403414231 - 2⁶ = 21431403414167 is a prime.

It is a super-3 number, since 3×21431403414231³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 21431403414192 and 21431403414201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21431403414251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316989415 + ... + 317057016.

It is an arithmetic number, because the mean of its divisors is an integer number (1883117903040).

Almost surely, 2^{21431403414231} is an apocalyptic number.

21431403414231 is a deficient number, since it is larger than the sum of its proper divisors (8698483034409).

21431403414231 is a wasteful number, since it uses less digits than its factorization.

21431403414231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634047046.

The product of its (nonzero) digits is 27648, while the sum is 33.

Adding to 21431403414231 its reverse (13241430413412), we get a palindrome (34672833827643).

The spelling of 21431403414231 in words is "twenty-one trillion, four hundred thirty-one billion, four hundred three million, four hundred fourteen thousand, two hundred thirty-one".