561667223 has 4 divisors (see below), whose sum is σ = 604872408. Its totient is φ = 518462040.

The previous prime is 561667219. The next prime is 561667243. The reversal of 561667223 is 322766165.

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

It is a cyclic number.

It is not a de Polignac number, because 561667223 - 2² = 561667219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561667213) 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, 21602573 + ... + 21602598.

It is an arithmetic number, because the mean of its divisors is an integer number (151218102).

Almost surely, 2^561667223 is an apocalyptic number.

561667223 is a deficient number, since it is larger than the sum of its proper divisors (43205185).

561667223 is a wasteful number, since it uses less digits than its factorization.

561667223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43205184.

The product of its digits is 90720, while the sum is 38.

The square root of 561667223 is about 23699.5194677023. The cubic root of 561667223 is about 825.0742378252.

The spelling of 561667223 in words is "five hundred sixty-one million, six hundred sixty-seven thousand, two hundred twenty-three".