243321302553 has 8 divisors (see below), whose sum is σ = 370775318208. Its totient is φ = 139040744304.

The previous prime is 243321302551. The next prime is 243321302557. The reversal of 243321302553 is 355203123342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243321302553 - 2¹ = 243321302551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243321302551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5793364326 + ... + 5793364367.

It is an arithmetic number, because the mean of its divisors is an integer number (46346914776).

Almost surely, 2^243321302553 is an apocalyptic number.

It is an amenable number.

243321302553 is a deficient number, since it is larger than the sum of its proper divisors (127454015655).

243321302553 is a wasteful number, since it uses less digits than its factorization.

243321302553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11586728703.

The product of its (nonzero) digits is 64800, while the sum is 33.

Adding to 243321302553 its reverse (355203123342), we get a palindrome (598524425895).

The spelling of 243321302553 in words is "two hundred forty-three billion, three hundred twenty-one million, three hundred two thousand, five hundred fifty-three".