243135141 has 4 divisors (see below), whose sum is σ = 324180192. Its totient is φ = 162090092.

The previous prime is 243135127. The next prime is 243135143. The reversal of 243135141 is 141531342.

It is a happy number.

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 243135141 - 2¹⁰ = 243134117 is a prime.

It is a super-2 number, since 2×243135141² = 118229393578179762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243135143) 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, 40522521 + ... + 40522526.

It is an arithmetic number, because the mean of its divisors is an integer number (81045048).

Almost surely, 2^243135141 is an apocalyptic number.

It is an amenable number.

243135141 is a deficient number, since it is larger than the sum of its proper divisors (81045051).

243135141 is an equidigital number, since it uses as much as digits as its factorization.

243135141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81045050.

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

The square root of 243135141 is about 15592.7913152200. The cubic root of 243135141 is about 624.1408063860.

Adding to 243135141 its reverse (141531342), we get a palindrome (384666483).

The spelling of 243135141 in words is "two hundred forty-three million, one hundred thirty-five thousand, one hundred forty-one".