565400243 has 2 divisors, whose sum is σ = 565400244. Its totient is φ = 565400242.

The previous prime is 565400201. The next prime is 565400261. The reversal of 565400243 is 342004565.

565400243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 565400243 - 2²⁶ = 498291379 is a prime.

It is not a weakly prime, because it can be changed into another prime (565400543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282700121 + 282700122.

It is an arithmetic number, because the mean of its divisors is an integer number (282700122).

Almost surely, 2^565400243 is an apocalyptic number.

565400243 is a deficient number, since it is larger than the sum of its proper divisors (1).

565400243 is an equidigital number, since it uses as much as digits as its factorization.

565400243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 565400243 is about 23778.1463322943. The cubic root of 565400243 is about 826.8981055256.

The spelling of 565400243 in words is "five hundred sixty-five million, four hundred thousand, two hundred forty-three".