2005157187 has 30 divisors (see below), whose sum is σ = 3292434684. Its totient is φ = 1215240840.

The previous prime is 2005157183. The next prime is 2005157213. The reversal of 2005157187 is 7817515002.

2005157187 is a `hidden beast` number, since 2 + 0 + 0 + 5 + 1 + 571 + 87 = 666.

It is not a de Polignac number, because 2005157187 - 2² = 2005157183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2005157183) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 92493 + ... + 112094.

Almost surely, 2^2005157187 is an apocalyptic number.

2005157187 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2005157187 is a deficient number, since it is larger than the sum of its proper divisors (1287277497).

2005157187 is a wasteful number, since it uses less digits than its factorization.

2005157187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204621 (or 204601 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 36.

The square root of 2005157187 is about 44778.9815315177. The cubic root of 2005157187 is about 1261.0030618141.

It can be divided in two parts, 200515 and 7187, that added together give a palindrome (207702).

The spelling of 2005157187 in words is "two billion, five million, one hundred fifty-seven thousand, one hundred eighty-seven".