565556249 has 2 divisors, whose sum is σ = 565556250. Its totient is φ = 565556248.

The previous prime is 565556239. The next prime is 565556279. The reversal of 565556249 is 942655565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 562021849 + 3534400 = 23707^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 565556249 - 2²⁰ = 564507673 is a prime.

It is not a weakly prime, because it can be changed into another prime (565556239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282778124 + 282778125.

It is an arithmetic number, because the mean of its divisors is an integer number (282778125).

Almost surely, 2^565556249 is an apocalyptic number.

It is an amenable number.

565556249 is a deficient number, since it is larger than the sum of its proper divisors (1).

565556249 is an equidigital number, since it uses as much as digits as its factorization.

565556249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620000, while the sum is 47.

The square root of 565556249 is about 23781.4265551922. The cubic root of 565556249 is about 826.9741514798.

The spelling of 565556249 in words is "five hundred sixty-five million, five hundred fifty-six thousand, two hundred forty-nine".