2001005535 has 8 divisors (see below), whose sum is σ = 3201608880. Its totient is φ = 1067202944.

The previous prime is 2001005507. The next prime is 2001005551. The reversal of 2001005535 is 5355001002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001005535 - 2⁶ = 2001005471 is a prime.

It is a super-2 number, since 2×2001005535² = 8008046302201272450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66700170 + ... + 66700199.

It is an arithmetic number, because the mean of its divisors is an integer number (400201110).

Almost surely, 2^2001005535 is an apocalyptic number.

2001005535 is a deficient number, since it is larger than the sum of its proper divisors (1200603345).

2001005535 is a wasteful number, since it uses less digits than its factorization.

2001005535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133400377.

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

The square root of 2001005535 is about 44732.6003603636. The cubic root of 2001005535 is about 1260.1321636373.

Adding to 2001005535 its reverse (5355001002), we get a palindrome (7356006537).

The spelling of 2001005535 in words is "two billion, one million, five thousand, five hundred thirty-five".