243211100340043 has 4 divisors (see below), whose sum is σ = 265321200370968. Its totient is φ = 221101000309120.

The previous prime is 243211100339981. The next prime is 243211100340059. The reversal of 243211100340043 is 340043001112342.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 243211100340043 - 2¹³ = 243211100331851 is a prime.

It is a super-2 number, since 2×243211100340043² (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 = 243211100339993 and 243211100340020.

It is not an unprimeable number, because it can be changed into a prime (243211100340343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11055050015446 + ... + 11055050015467.

It is an arithmetic number, because the mean of its divisors is an integer number (66330300092742).

Almost surely, 2^{243211100340043} is an apocalyptic number.

243211100340043 is a deficient number, since it is larger than the sum of its proper divisors (22110100030925).

243211100340043 is a wasteful number, since it uses less digits than its factorization.

243211100340043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22110100030924.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 243211100340043 its reverse (340043001112342), we get a palindrome (583254101452385).

The spelling of 243211100340043 in words is "two hundred forty-three trillion, two hundred eleven billion, one hundred million, three hundred forty thousand, forty-three".