203541243545 has 4 divisors (see below), whose sum is σ = 244249492260. Its totient is φ = 162832994832.

The previous prime is 203541243461. The next prime is 203541243553. The reversal of 203541243545 is 545342145302.

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 130059045769 + 73482197776 = 360637^2 + 271076^2 .

It is a cyclic number.

It is not a de Polignac number, because 203541243545 - 2¹⁴ = 203541227161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203541243499 and 203541243508.

It is an unprimeable number.

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, 20354124350 + ... + 20354124359.

It is an arithmetic number, because the mean of its divisors is an integer number (61062373065).

Almost surely, 2^203541243545 is an apocalyptic number.

It is an amenable number.

203541243545 is a deficient number, since it is larger than the sum of its proper divisors (40708248715).

203541243545 is an equidigital number, since it uses as much as digits as its factorization.

203541243545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40708248714.

The product of its (nonzero) digits is 288000, while the sum is 38.

Adding to 203541243545 its reverse (545342145302), we get a palindrome (748883388847).

The spelling of 203541243545 in words is "two hundred three billion, five hundred forty-one million, two hundred forty-three thousand, five hundred forty-five".