2005217187 has 4 divisors (see below), whose sum is σ = 2673622920. Its totient is φ = 1336811456.

The previous prime is 2005217161. The next prime is 2005217213. The reversal of 2005217187 is 7817125002.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2005217161) and next prime (2005217213).

It is a cyclic number.

It is not a de Polignac number, because 2005217187 - 2⁷ = 2005217059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2005217107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334202862 + ... + 334202867.

It is an arithmetic number, because the mean of its divisors is an integer number (668405730).

Almost surely, 2^2005217187 is an apocalyptic number.

2005217187 is a deficient number, since it is larger than the sum of its proper divisors (668405733).

2005217187 is an equidigital number, since it uses as much as digits as its factorization.

2005217187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668405732.

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 2005217187 is about 44779.6514836817. The cubic root of 2005217187 is about 1261.0156392867.

The spelling of 2005217187 in words is "two billion, five million, two hundred seventeen thousand, one hundred eighty-seven".