243123343401 has 16 divisors (see below), whose sum is σ = 335980040000. Its totient is φ = 156254816448.

The previous prime is 243123343391. The next prime is 243123343433. The reversal of 243123343401 is 104343321342.

It is a happy number.

It is not a de Polignac number, because 243123343401 - 2⁵ = 243123343369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243123343201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10035151 + ... + 10059348.

It is an arithmetic number, because the mean of its divisors is an integer number (20998752500).

Almost surely, 2^243123343401 is an apocalyptic number.

It is an amenable number.

243123343401 is a deficient number, since it is larger than the sum of its proper divisors (92856696599).

243123343401 is a wasteful number, since it uses less digits than its factorization.

243123343401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20094648.

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 243123343401 its reverse (104343321342), we get a palindrome (347466664743).

The spelling of 243123343401 in words is "two hundred forty-three billion, one hundred twenty-three million, three hundred forty-three thousand, four hundred one".