2001115225 has 6 divisors (see below), whose sum is σ = 2481382910. Its totient is φ = 1600892160.

The previous prime is 2001115163. The next prime is 2001115231. The reversal of 2001115225 is 5225111002.

It can be written as a sum of positive squares in 3 ways, for example, as 288728064 + 1712387161 = 16992^2 + 41381^2 .

It is not a de Polignac number, because 2001115225 - 2⁷ = 2001115097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40022280 + ... + 40022329.

Almost surely, 2^2001115225 is an apocalyptic number.

2001115225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2001115225 is a deficient number, since it is larger than the sum of its proper divisors (480267685).

2001115225 is an equidigital number, since it uses as much as digits as its factorization.

2001115225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80044619 (or 80044614 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 2001115225 is about 44733.8264068702. The cubic root of 2001115225 is about 1260.1551889561.

Adding to 2001115225 its reverse (5225111002), we get a palindrome (7226226227).

The spelling of 2001115225 in words is "two billion, one million, one hundred fifteen thousand, two hundred twenty-five".