201306206345 has 16 divisors (see below), whose sum is σ = 244931241360. Its totient is φ = 158803421184.

The previous prime is 201306206303. The next prime is 201306206357. The reversal of 201306206345 is 543602603102.

It can be written as a sum of positive squares in 8 ways, for example, as 24980118601 + 176326087744 = 158051^2 + 419912^2 .

It is a cyclic number.

It is not a de Polignac number, because 201306206345 - 2¹⁸ = 201305944201 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1640591 + ... + 1759019.

It is an arithmetic number, because the mean of its divisors is an integer number (15308202585).

Almost surely, 2^201306206345 is an apocalyptic number.

It is an amenable number.

201306206345 is a deficient number, since it is larger than the sum of its proper divisors (43625035015).

201306206345 is a wasteful number, since it uses less digits than its factorization.

201306206345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123164.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 201306206345 its reverse (543602603102), we get a palindrome (744908809447).

The spelling of 201306206345 in words is "two hundred one billion, three hundred six million, two hundred six thousand, three hundred forty-five".