561653223 has 8 divisors (see below), whose sum is σ = 756285936. Its totient is φ = 370728000.

The previous prime is 561653203. The next prime is 561653251. The reversal of 561653223 is 322356165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561653223 - 2¹⁷ = 561522151 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561653203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926518 + ... + 927123.

It is an arithmetic number, because the mean of its divisors is an integer number (94535742).

Almost surely, 2^561653223 is an apocalyptic number.

561653223 is a deficient number, since it is larger than the sum of its proper divisors (194632713).

561653223 is a wasteful number, since it uses less digits than its factorization.

561653223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853745.

The product of its digits is 32400, while the sum is 33.

The square root of 561653223 is about 23699.2241012232. The cubic root of 561653223 is about 825.0673825588.

The spelling of 561653223 in words is "five hundred sixty-one million, six hundred fifty-three thousand, two hundred twenty-three".