243115030221 has 24 divisors (see below), whose sum is σ = 377116614720. Its totient is φ = 138908048832.

The previous prime is 243115030177. The next prime is 243115030229. The reversal of 243115030221 is 122030511342.

It is not a de Polignac number, because 243115030221 - 2¹⁸ = 243114768077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243115030191 and 243115030200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243115030229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1376280 + ... + 1542846.

It is an arithmetic number, because the mean of its divisors is an integer number (15713192280).

Almost surely, 2^243115030221 is an apocalyptic number.

243115030221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

243115030221 is a deficient number, since it is larger than the sum of its proper divisors (134001584499).

243115030221 is a wasteful number, since it uses less digits than its factorization.

243115030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176513 (or 176506 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 243115030221 its reverse (122030511342), we get a palindrome (365145541563).

The spelling of 243115030221 in words is "two hundred forty-three billion, one hundred fifteen million, thirty thousand, two hundred twenty-one".