201117587 has 8 divisors (see below), whose sum is σ = 224752752. Its totient is φ = 178374400.

The previous prime is 201117583. The next prime is 201117593. The reversal of 201117587 is 785711102.

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 201117587 - 2² = 201117583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201117583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222518 + ... + 223419.

It is an arithmetic number, because the mean of its divisors is an integer number (28094094).

Almost surely, 2^201117587 is an apocalyptic number.

201117587 is a deficient number, since it is larger than the sum of its proper divisors (23635165).

201117587 is a wasteful number, since it uses less digits than its factorization.

201117587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445989.

The product of its (nonzero) digits is 3920, while the sum is 32.

The square root of 201117587 is about 14181.5932461765. The cubic root of 201117587 is about 585.8908063773.

Adding to 201117587 its reverse (785711102), we get a palindrome (986828689).

The spelling of 201117587 in words is "two hundred one million, one hundred seventeen thousand, five hundred eighty-seven".