13203551335243 has 4 divisors (see below), whose sum is σ = 13221564366448. Its totient is φ = 13185538304040.

The previous prime is 13203551335237. The next prime is 13203551335283. The reversal of 13203551335243 is 34253315530231.

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

It is a cyclic number.

It is not a de Polignac number, because 13203551335243 - 2¹⁷ = 13203551204171 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13203551335196 and 13203551335205.

It is not an unprimeable number, because it can be changed into a prime (13203551335223) 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, 9006514503 + ... + 9006515968.

It is an arithmetic number, because the mean of its divisors is an integer number (3305391091612).

Almost surely, 2^{13203551335243} is an apocalyptic number.

13203551335243 is a deficient number, since it is larger than the sum of its proper divisors (18013031205).

13203551335243 is an equidigital number, since it uses as much as digits as its factorization.

13203551335243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18013031204.

The product of its (nonzero) digits is 486000, while the sum is 40.

Adding to 13203551335243 its reverse (34253315530231), we get a palindrome (47456866865474).

The spelling of 13203551335243 in words is "thirteen trillion, two hundred three billion, five hundred fifty-one million, three hundred thirty-five thousand, two hundred forty-three".