243202101 has 4 divisors (see below), whose sum is σ = 324269472. Its totient is φ = 162134732.

The previous prime is 243202097. The next prime is 243202117. The reversal of 243202101 is 101202342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243202101 - 2² = 243202097 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 (243202151) 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, 40533681 + ... + 40533686.

It is an arithmetic number, because the mean of its divisors is an integer number (81067368).

Almost surely, 2^243202101 is an apocalyptic number.

It is an amenable number.

243202101 is a deficient number, since it is larger than the sum of its proper divisors (81067371).

243202101 is an equidigital number, since it uses as much as digits as its factorization.

243202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81067370.

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

The square root of 243202101 is about 15594.9383134400. The cubic root of 243202101 is about 624.1980977512.

Adding to 243202101 its reverse (101202342), we get a palindrome (344404443).

The spelling of 243202101 in words is "two hundred forty-three million, two hundred two thousand, one hundred one".