561100223 has 2 divisors, whose sum is σ = 561100224. Its totient is φ = 561100222.

The previous prime is 561100219. The next prime is 561100237. The reversal of 561100223 is 322001165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561100223 - 2² = 561100219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561100195 and 561100204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561100823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280550111 + 280550112.

It is an arithmetic number, because the mean of its divisors is an integer number (280550112).

Almost surely, 2^561100223 is an apocalyptic number.

561100223 is a deficient number, since it is larger than the sum of its proper divisors (1).

561100223 is an equidigital number, since it uses as much as digits as its factorization.

561100223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 561100223 is about 23687.5541793576. The cubic root of 561100223 is about 824.7965083668.

Adding to 561100223 its reverse (322001165), we get a palindrome (883101388).

The spelling of 561100223 in words is "five hundred sixty-one million, one hundred thousand, two hundred twenty-three".