2001038506 has 4 divisors (see below), whose sum is σ = 3001557762. Its totient is φ = 1000519252.

The previous prime is 2001038503. The next prime is 2001038527. The reversal of 2001038506 is 6058301002.

It is a happy number.

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., 1536248025 + 464790481 = 39195^2 + 21559^2 .

It is not an unprimeable number, because it can be changed into a prime (2001038503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500259625 + ... + 500259628.

Almost surely, 2^2001038506 is an apocalyptic number.

2001038506 is a deficient number, since it is larger than the sum of its proper divisors (1000519256).

2001038506 is a wasteful number, since it uses less digits than its factorization.

2001038506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000519255.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2001038506 is about 44732.9688932000. The cubic root of 2001038506 is about 1260.1390847558.

Adding to 2001038506 its reverse (6058301002), we get a palindrome (8059339508).

The spelling of 2001038506 in words is "two billion, one million, thirty-eight thousand, five hundred six".