243123101 has 8 divisors (see below), whose sum is σ = 265733664. Its totient is φ = 221070960.

The previous prime is 243123091. The next prime is 243123113. The reversal of 243123101 is 101321342.

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

It is a cyclic number.

It is not a de Polignac number, because 243123101 - 2²² = 238928797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 243123101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243123191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138695 + ... + 140436.

It is an arithmetic number, because the mean of its divisors is an integer number (33216708).

Almost surely, 2^243123101 is an apocalyptic number.

It is an amenable number.

243123101 is a deficient number, since it is larger than the sum of its proper divisors (22610563).

243123101 is a wasteful number, since it uses less digits than its factorization.

243123101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279211.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 243123101 is about 15592.4052346006. The cubic root of 243123101 is about 624.1305037764.

Adding to 243123101 its reverse (101321342), we get a palindrome (344444443).

The spelling of 243123101 in words is "two hundred forty-three million, one hundred twenty-three thousand, one hundred one".