2001547550 has 24 divisors (see below), whose sum is σ = 3842974272. Its totient is φ = 774792000.

The previous prime is 2001547529. The next prime is 2001547601. The reversal of 2001547550 is 557451002.

It is a super-2 number, since 2×2001547550² = 8012385189822005000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 644111 + ... + 647210.

It is an arithmetic number, because the mean of its divisors is an integer number (160123928).

Almost surely, 2^2001547550 is an apocalyptic number.

2001547550 is a deficient number, since it is larger than the sum of its proper divisors (1841426722).

2001547550 is a wasteful number, since it uses less digits than its factorization.

2001547550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291364 (or 1291359 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 2001547550 is about 44738.6583392931. The cubic root of 2001547550 is about 1260.2459312510.

Adding to 2001547550 its reverse (557451002), we get a palindrome (2558998552).

The spelling of 2001547550 in words is "two billion, one million, five hundred forty-seven thousand, five hundred fifty".