201072200509 has 4 divisors (see below), whose sum is σ = 201075841980. Its totient is φ = 201068559040.

The previous prime is 201072200507. The next prime is 201072200519. The reversal of 201072200509 is 905002270102.

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 92281073284 + 108791127225 = 303778^2 + 329835^2 .

It is a cyclic number.

It is not a de Polignac number, because 201072200509 - 2¹ = 201072200507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201072200507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1736614 + ... + 1848775.

It is an arithmetic number, because the mean of its divisors is an integer number (50268960495).

Almost surely, 2^201072200509 is an apocalyptic number.

It is an amenable number.

201072200509 is a deficient number, since it is larger than the sum of its proper divisors (3641471).

201072200509 is an equidigital number, since it uses as much as digits as its factorization.

201072200509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3641470.

The product of its (nonzero) digits is 2520, while the sum is 28.

The spelling of 201072200509 in words is "two hundred one billion, seventy-two million, two hundred thousand, five hundred nine".