243453621224523 has 4 divisors (see below), whose sum is σ = 324604828299368. Its totient is φ = 162302414149680.

The previous prime is 243453621224467. The next prime is 243453621224533. The reversal of 243453621224523 is 325422126354342.

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

It is not a de Polignac number, because 243453621224523 - 2⁶ = 243453621224459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243453621224533) 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, 40575603537418 + ... + 40575603537423.

It is an arithmetic number, because the mean of its divisors is an integer number (81151207074842).

Almost surely, 2^{243453621224523} is an apocalyptic number.

243453621224523 is a deficient number, since it is larger than the sum of its proper divisors (81151207074845).

243453621224523 is an equidigital number, since it uses as much as digits as its factorization.

243453621224523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81151207074844.

The product of its digits is 8294400, while the sum is 48.

Adding to 243453621224523 its reverse (325422126354342), we get a palindrome (568875747578865).

The spelling of 243453621224523 in words is "two hundred forty-three trillion, four hundred fifty-three billion, six hundred twenty-one million, two hundred twenty-four thousand, five hundred twenty-three".