2001505554 has 24 divisors (see below), whose sum is σ = 4337666892. Its totient is φ = 667003680.

The previous prime is 2001505553. The next prime is 2001505559. The reversal of 2001505554 is 4555051002.

It can be written as a sum of positive squares in 2 ways, for example, as 1994069025 + 7436529 = 44655^2 + 2727^2 .

It is not an unprimeable number, because it can be changed into a prime (2001505553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77524 + ... + 100064.

Almost surely, 2^2001505554 is an apocalyptic number.

2001505554 is an abundant number, since it is smaller than the sum of its proper divisors (2336161338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001505554 is a wasteful number, since it uses less digits than its factorization.

2001505554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27482 (or 27479 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 2001505554 is about 44738.1889888270. The cubic root of 2001505554 is about 1260.2371171281.

Adding to 2001505554 its reverse (4555051002), we get a palindrome (6556556556).

The spelling of 2001505554 in words is "two billion, one million, five hundred five thousand, five hundred fifty-four".