201155204345 has 4 divisors (see below), whose sum is σ = 241386245220. Its totient is φ = 160924163472.

The previous prime is 201155204333. The next prime is 201155204351. The reversal of 201155204345 is 543402551102.

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 53191119424 + 147964084921 = 230632^2 + 384661^2 .

It is a cyclic number.

It is not a de Polignac number, because 201155204345 - 2³⁰ = 200081462521 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20115520430 + ... + 20115520439.

It is an arithmetic number, because the mean of its divisors is an integer number (60346561305).

Almost surely, 2^201155204345 is an apocalyptic number.

It is an amenable number.

201155204345 is a deficient number, since it is larger than the sum of its proper divisors (40231040875).

201155204345 is an equidigital number, since it uses as much as digits as its factorization.

201155204345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40231040874.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 201155204345 its reverse (543402551102), we get a palindrome (744557755447).

The spelling of 201155204345 in words is "two hundred one billion, one hundred fifty-five million, two hundred four thousand, three hundred forty-five".