2001153505 has 12 divisors (see below), whose sum is σ = 2600316540. Its totient is φ = 1477774272.

The previous prime is 2001153491. The next prime is 2001153523. The reversal of 2001153505 is 5053511002.

It can be written as a sum of positive squares in 6 ways, for example, as 161772961 + 1839380544 = 12719^2 + 42888^2 .

It is not a de Polignac number, because 2001153505 - 2⁷ = 2001153377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1183270 + ... + 1184959.

It is an arithmetic number, because the mean of its divisors is an integer number (216693045).

Almost surely, 2^2001153505 is an apocalyptic number.

It is an amenable number.

2001153505 is a deficient number, since it is larger than the sum of its proper divisors (599163035).

2001153505 is a wasteful number, since it uses less digits than its factorization.

2001153505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368260 (or 2368247 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 2001153505 is about 44734.2542689604. The cubic root of 2001153505 is about 1260.1632242144.

Adding to 2001153505 its reverse (5053511002), we get a palindrome (7054664507).

The spelling of 2001153505 in words is "two billion, one million, one hundred fifty-three thousand, five hundred five".