21231514430343 has 40 divisors (see below), whose sum is σ = 36284431075200. Its totient is φ = 12119799007440.

The previous prime is 21231514430303. The next prime is 21231514430351. The reversal of 21231514430343 is 34303441513212.

21231514430343 is a `hidden beast` number, since 2 + 1 + 23 + 151 + 443 + 0 + 3 + 43 = 666.

It is not a de Polignac number, because 21231514430343 - 2¹⁰ = 21231514429319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21231514430298 and 21231514430307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231514430303) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18731293 + ... + 19832406.

It is an arithmetic number, because the mean of its divisors is an integer number (907110776880).

Almost surely, 2^{21231514430343} is an apocalyptic number.

21231514430343 is a deficient number, since it is larger than the sum of its proper divisors (15052916644857).

21231514430343 is an equidigital number, since it uses as much as digits as its factorization.

21231514430343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38564689 (or 38564680 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 21231514430343 its reverse (34303441513212), we get a palindrome (55534955943555).

The spelling of 21231514430343 in words is "twenty-one trillion, two hundred thirty-one billion, five hundred fourteen million, four hundred thirty thousand, three hundred forty-three".