243423020341331 has 4 divisors (see below), whose sum is σ = 247413561658464. Its totient is φ = 239432479024200.

The previous prime is 243423020341309. The next prime is 243423020341337. The reversal of 243423020341331 is 133143020324342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243423020341331 is a prime.

It is a super-2 number, since 2×243423020341331² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243423020341291 and 243423020341300.

It is not an unprimeable number, because it can be changed into a prime (243423020341337) 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 3 ways as a sum of consecutive naturals, for example, 1995270658475 + ... + 1995270658596.

It is an arithmetic number, because the mean of its divisors is an integer number (61853390414616).

Almost surely, 2^{243423020341331} is an apocalyptic number.

243423020341331 is a deficient number, since it is larger than the sum of its proper divisors (3990541317133).

243423020341331 is an equidigital number, since it uses as much as digits as its factorization.

243423020341331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3990541317132.

The product of its (nonzero) digits is 124416, while the sum is 35.

Adding to 243423020341331 its reverse (133143020324342), we get a palindrome (376566040665673).

The spelling of 243423020341331 in words is "two hundred forty-three trillion, four hundred twenty-three billion, twenty million, three hundred forty-one thousand, three hundred thirty-one".