2001115253 has 8 divisors (see below), whose sum is σ = 2097489408. Its totient is φ = 1905521904.

The previous prime is 2001115247. The next prime is 2001115261. The reversal of 2001115253 is 3525111002.

It is a happy number.

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 2001115253 - 2¹⁶ = 2001049717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001118253) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 189950 + ... + 200207.

It is an arithmetic number, because the mean of its divisors is an integer number (262186176).

Almost surely, 2^2001115253 is an apocalyptic number.

2001115253 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2001115253 is a deficient number, since it is larger than the sum of its proper divisors (96374155).

2001115253 is a wasteful number, since it uses less digits than its factorization.

2001115253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390403.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 2001115253 is about 44733.8267198325. The cubic root of 2001115253 is about 1260.1551948336.

Adding to 2001115253 its reverse (3525111002), we get a palindrome (5526226255).

The spelling of 2001115253 in words is "two billion, one million, one hundred fifteen thousand, two hundred fifty-three".