201072200506 has 4 divisors (see below), whose sum is σ = 301608300762. Its totient is φ = 100536100252.

The previous prime is 201072200447. The next prime is 201072200507. The reversal of 201072200506 is 605002270102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 200923580025 + 148620481 = 448245^2 + 12191^2 .

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 as a sum of consecutive naturals, namely, 50268050125 + ... + 50268050128.

Almost surely, 2^201072200506 is an apocalyptic number.

201072200506 is a deficient number, since it is larger than the sum of its proper divisors (100536100256).

201072200506 is a wasteful number, since it uses less digits than its factorization.

201072200506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100536100255.

The product of its (nonzero) digits is 1680, while the sum is 25.

Adding to 201072200506 its reverse (605002270102), we get a palindrome (806074470608).

The spelling of 201072200506 in words is "two hundred one billion, seventy-two million, two hundred thousand, five hundred six".