203513420243 has 6 divisors (see below), whose sum is σ = 236740101156. Its totient is φ = 174440074452.

The previous prime is 203513420221. The next prime is 203513420249. The reversal of 203513420243 is 342024315302.

It is a happy number.

It is not a de Polignac number, because 203513420243 - 2¹⁴ = 203513403859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203513420249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2076667505 + ... + 2076667602.

It is an arithmetic number, because the mean of its divisors is an integer number (39456683526).

Almost surely, 2^203513420243 is an apocalyptic number.

203513420243 is a deficient number, since it is larger than the sum of its proper divisors (33226680913).

203513420243 is an equidigital number, since it uses as much as digits as its factorization.

203513420243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4153335121 (or 4153335114 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 203513420243 its reverse (342024315302), we get a palindrome (545537735545).

The spelling of 203513420243 in words is "two hundred three billion, five hundred thirteen million, four hundred twenty thousand, two hundred forty-three".