201255403361 has 4 divisors (see below), whose sum is σ = 201604200132. Its totient is φ = 200906606592.

The previous prime is 201255403357. The next prime is 201255403411. The reversal of 201255403361 is 163304552102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 163304552102 = 2 ⋅81652276051.

It can be written as a sum of positive squares in 2 ways, for example, as 178458933136 + 22796470225 = 422444^2 + 150985^2 .

It is a cyclic number.

It is not a de Polignac number, because 201255403361 - 2² = 201255403357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201255403061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174397520 + ... + 174398673.

It is an arithmetic number, because the mean of its divisors is an integer number (50401050033).

Almost surely, 2^201255403361 is an apocalyptic number.

It is an amenable number.

201255403361 is a deficient number, since it is larger than the sum of its proper divisors (348796771).

201255403361 is an equidigital number, since it uses as much as digits as its factorization.

201255403361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348796770.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 201255403361 its reverse (163304552102), we get a palindrome (364559955463).

The spelling of 201255403361 in words is "two hundred one billion, two hundred fifty-five million, four hundred three thousand, three hundred sixty-one".