243350020453 has 4 divisors (see below), whose sum is σ = 243354074860. Its totient is φ = 243345966048.

The previous prime is 243350020399. The next prime is 243350020481. The reversal of 243350020453 is 354020053342.

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 113607421249 + 129742599204 = 337057^2 + 360198^2 .

It is a cyclic number.

It is not a de Polignac number, because 243350020453 - 2³⁷ = 105911066981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243350020153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1935798 + ... + 2057671.

It is an arithmetic number, because the mean of its divisors is an integer number (60838518715).

Almost surely, 2^243350020453 is an apocalyptic number.

It is an amenable number.

243350020453 is a deficient number, since it is larger than the sum of its proper divisors (4054407).

243350020453 is an equidigital number, since it uses as much as digits as its factorization.

243350020453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4054406.

The product of its (nonzero) digits is 43200, while the sum is 31.

Adding to 243350020453 its reverse (354020053342), we get a palindrome (597370073795).

The spelling of 243350020453 in words is "two hundred forty-three billion, three hundred fifty million, twenty thousand, four hundred fifty-three".