561117201 has 32 divisors (see below), whose sum is σ = 799839360. Its totient is φ = 349300224.

The previous prime is 561117187. The next prime is 561117203. The reversal of 561117201 is 102711165.

It is not a de Polignac number, because 561117201 - 2⁵ = 561117169 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (561117203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 335770 + ... + 337436.

It is an arithmetic number, because the mean of its divisors is an integer number (24994980).

Almost surely, 2^561117201 is an apocalyptic number.

It is an amenable number.

561117201 is a deficient number, since it is larger than the sum of its proper divisors (238722159).

561117201 is a wasteful number, since it uses less digits than its factorization.

561117201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825.

The product of its (nonzero) digits is 420, while the sum is 24.

The square root of 561117201 is about 23687.9125504971. The cubic root of 561117201 is about 824.8048272929.

Adding to 561117201 its reverse (102711165), we get a palindrome (663828366).

The spelling of 561117201 in words is "five hundred sixty-one million, one hundred seventeen thousand, two hundred one".