243420321431 has 8 divisors (see below), whose sum is σ = 281546396544. Its totient is φ = 206132182200.

The previous prime is 243420321421. The next prime is 243420321433. The reversal of 243420321431 is 134123024342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243420321431 - 2⁶ = 243420321367 is a prime.

It is a super-2 number, since 2×243420321431² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243420321394 and 243420321403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243420321433) 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 7 ways as a sum of consecutive naturals, for example, 209483345 + ... + 209484506.

It is an arithmetic number, because the mean of its divisors is an integer number (35193299568).

Almost surely, 2^243420321431 is an apocalyptic number.

243420321431 is a deficient number, since it is larger than the sum of its proper divisors (38126075113).

243420321431 is an equidigital number, since it uses as much as digits as its factorization.

243420321431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418967941.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 243420321431 its reverse (134123024342), we get a palindrome (377543345773).

The spelling of 243420321431 in words is "two hundred forty-three billion, four hundred twenty million, three hundred twenty-one thousand, four hundred thirty-one".