2001025855 has 8 divisors (see below), whose sum is σ = 2457073872. Its totient is φ = 1563592128.

The previous prime is 2001025801. The next prime is 2001025927. The reversal of 2001025855 is 5585201002.

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 2001025855 - 2²⁵ = 1967471423 is a prime.

It is a Duffinian number.

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, 4653334 + ... + 4653763.

It is an arithmetic number, because the mean of its divisors is an integer number (307134234).

Almost surely, 2^2001025855 is an apocalyptic number.

2001025855 is a deficient number, since it is larger than the sum of its proper divisors (456048017).

2001025855 is an equidigital number, since it uses as much as digits as its factorization.

2001025855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9307145.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 2001025855 is about 44732.8274872045. The cubic root of 2001025855 is about 1260.1364291259.

Adding to 2001025855 its reverse (5585201002), we get a palindrome (7586226857).

The spelling of 2001025855 in words is "two billion, one million, twenty-five thousand, eight hundred fifty-five".