21431342223 has 6 divisors (see below), whose sum is σ = 30956383224. Its totient is φ = 14287561476.

The previous prime is 21431342203. The next prime is 21431342299. The reversal of 21431342223 is 32224313412.

21431342223 is a `hidden beast` number, since 2 + 1 + 431 + 3 + 4 + 2 + 223 = 666.

It is not a de Polignac number, because 21431342223 - 2¹² = 21431338127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21431342203) 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 5 ways as a sum of consecutive naturals, for example, 1190630115 + ... + 1190630132.

It is an arithmetic number, because the mean of its divisors is an integer number (5159397204).

Almost surely, 2^21431342223 is an apocalyptic number.

21431342223 is a deficient number, since it is larger than the sum of its proper divisors (9525041001).

21431342223 is a wasteful number, since it uses less digits than its factorization.

21431342223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381260253 (or 2381260250 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 21431342223 its reverse (32224313412), we get a palindrome (53655655635).

The spelling of 21431342223 in words is "twenty-one billion, four hundred thirty-one million, three hundred forty-two thousand, two hundred twenty-three".