243420530345 has 4 divisors (see below), whose sum is σ = 292104636420. Its totient is φ = 194736424272.

The previous prime is 243420530341. The next prime is 243420530351. The reversal of 243420530345 is 543035024342.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98066680336 + 145353850009 = 313156^2 + 381253^2 .

It is a cyclic number.

It is not a de Polignac number, because 243420530345 - 2² = 243420530341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243420530341) 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, 24342053030 + ... + 24342053039.

It is an arithmetic number, because the mean of its divisors is an integer number (73026159105).

Almost surely, 2^243420530345 is an apocalyptic number.

It is an amenable number.

243420530345 is a deficient number, since it is larger than the sum of its proper divisors (48684106075).

243420530345 is an equidigital number, since it uses as much as digits as its factorization.

243420530345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48684106074.

The product of its (nonzero) digits is 172800, while the sum is 35.

Adding to 243420530345 its reverse (543035024342), we get a palindrome (786455554687).

The spelling of 243420530345 in words is "two hundred forty-three billion, four hundred twenty million, five hundred thirty thousand, three hundred forty-five".