243220141 has 4 divisors (see below), whose sum is σ = 251065984. Its totient is φ = 235374300.

The previous prime is 243220099. The next prime is 243220189. The reversal of 243220141 is 141022342.

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 243220141 - 2¹¹ = 243218093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243220841) 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, 3922875 + ... + 3922936.

It is an arithmetic number, because the mean of its divisors is an integer number (62766496).

Almost surely, 2^243220141 is an apocalyptic number.

It is an amenable number.

243220141 is a deficient number, since it is larger than the sum of its proper divisors (7845843).

243220141 is an equidigital number, since it uses as much as digits as its factorization.

243220141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7845842.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 243220141 is about 15595.5166955122. The cubic root of 243220141 is about 624.2135310817.

Adding to 243220141 its reverse (141022342), we get a palindrome (384242483).

The spelling of 243220141 in words is "two hundred forty-three million, two hundred twenty thousand, one hundred forty-one".