2001530505 has 64 divisors (see below), whose sum is σ = 3505582080. Its totient is φ = 969290496.

The previous prime is 2001530477. The next prime is 2001530521. The reversal of 2001530505 is 5050351002.

It is not a de Polignac number, because 2001530505 - 2⁵ = 2001530473 is a prime.

It is a super-2 number, since 2×2001530505² = 8012248724891110050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4559076 + ... + 4559514.

It is an arithmetic number, because the mean of its divisors is an integer number (54774720).

Almost surely, 2^2001530505 is an apocalyptic number.

It is an amenable number.

2001530505 is a deficient number, since it is larger than the sum of its proper divisors (1504051575).

2001530505 is a wasteful number, since it uses less digits than its factorization.

2001530505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 2001530505 is about 44738.4678436801. The cubic root of 2001530505 is about 1260.2423538603.

Adding to 2001530505 its reverse (5050351002), we get a palindrome (7051881507).

The spelling of 2001530505 in words is "two billion, one million, five hundred thirty thousand, five hundred five".