561854243 has 2 divisors, whose sum is σ = 561854244. Its totient is φ = 561854242.

The previous prime is 561854231. The next prime is 561854257. The reversal of 561854243 is 342458165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561854243 - 2⁶ = 561854179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561854197 and 561854206.

It is not a weakly prime, because it can be changed into another prime (561854443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280927121 + 280927122.

It is an arithmetic number, because the mean of its divisors is an integer number (280927122).

Almost surely, 2^561854243 is an apocalyptic number.

561854243 is a deficient number, since it is larger than the sum of its proper divisors (1).

561854243 is an equidigital number, since it uses as much as digits as its factorization.

561854243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 38.

The square root of 561854243 is about 23703.4647889291. The cubic root of 561854243 is about 825.1658034678.

The spelling of 561854243 in words is "five hundred sixty-one million, eight hundred fifty-four thousand, two hundred forty-three".