243542341 has 4 divisors (see below), whose sum is σ = 278334112. Its totient is φ = 208750572.

The previous prime is 243542311. The next prime is 243542353. The reversal of 243542341 is 143245342.

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, and also an emirpimes, since its reverse is a distinct semiprime: 143245342 = 2 ⋅71622671.

It is a cyclic number.

It is not a de Polignac number, because 243542341 - 2⁷ = 243542213 is a prime.

It is a super-3 number, since 3×243542341³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243542311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17395875 + ... + 17395888.

It is an arithmetic number, because the mean of its divisors is an integer number (69583528).

Almost surely, 2^243542341 is an apocalyptic number.

It is an amenable number.

243542341 is a deficient number, since it is larger than the sum of its proper divisors (34791771).

243542341 is an equidigital number, since it uses as much as digits as its factorization.

243542341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34791770.

The product of its digits is 11520, while the sum is 28.

The square root of 243542341 is about 15605.8431685058. The cubic root of 243542341 is about 624.4890467166.

Adding to 243542341 its reverse (143245342), we get a palindrome (386787683).

The spelling of 243542341 in words is "two hundred forty-three million, five hundred forty-two thousand, three hundred forty-one".