561117233 has 4 divisors (see below), whose sum is σ = 561946740. Its totient is φ = 560287728.

The previous prime is 561117229. The next prime is 561117289. The reversal of 561117233 is 332711165.

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

It can be written as a sum of positive squares in 2 ways, for example, as 558518689 + 2598544 = 23633^2 + 1612^2 .

It is a cyclic number.

It is not a de Polignac number, because 561117233 - 2² = 561117229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 561117196 and 561117205.

It is not an unprimeable number, because it can be changed into a prime (561117203) 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, 413738 + ... + 415091.

It is an arithmetic number, because the mean of its divisors is an integer number (140486685).

Almost surely, 2^561117233 is an apocalyptic number.

It is an amenable number.

561117233 is a deficient number, since it is larger than the sum of its proper divisors (829507).

561117233 is an equidigital number, since it uses as much as digits as its factorization.

561117233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829506.

The product of its digits is 3780, while the sum is 29.

The square root of 561117233 is about 23687.9132259471. The cubic root of 561117233 is about 824.8048429722.

Adding to 561117233 its reverse (332711165), we get a palindrome (893828398).

The spelling of 561117233 in words is "five hundred sixty-one million, one hundred seventeen thousand, two hundred thirty-three".