243220101 has 8 divisors (see below), whose sum is σ = 338393280. Its totient is φ = 155096832.

The previous prime is 243220099. The next prime is 243220189. The reversal of 243220101 is 101022342.

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

It is not a de Polignac number, because 243220101 - 2¹ = 243220099 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243200101) 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, 1762396 + ... + 1762533.

It is an arithmetic number, because the mean of its divisors is an integer number (42299160).

Almost surely, 2^243220101 is an apocalyptic number.

It is an amenable number.

243220101 is a deficient number, since it is larger than the sum of its proper divisors (95173179).

243220101 is a wasteful number, since it uses less digits than its factorization.

243220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524955.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 243220101 is about 15595.5154130923. The cubic root of 243220101 is about 624.2134968623.

Adding to 243220101 its reverse (101022342), we get a palindrome (344242443).

The spelling of 243220101 in words is "two hundred forty-three million, two hundred twenty thousand, one hundred one".