2001207550 has 12 divisors (see below), whose sum is σ = 3722246136. Its totient is φ = 800483000.

The previous prime is 2001207503. The next prime is 2001207557. The reversal of 2001207550 is 557021002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001207557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20012026 + ... + 20012125.

It is an arithmetic number, because the mean of its divisors is an integer number (310187178).

Almost surely, 2^2001207550 is an apocalyptic number.

2001207550 is a deficient number, since it is larger than the sum of its proper divisors (1721038586).

2001207550 is a wasteful number, since it uses less digits than its factorization.

2001207550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40024163 (or 40024158 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 2001207550 is about 44734.8583321776. The cubic root of 2001207550 is about 1260.1745684896.

Adding to 2001207550 its reverse (557021002), we get a palindrome (2558228552).

The spelling of 2001207550 in words is "two billion, one million, two hundred seven thousand, five hundred fifty".