556565501 has 2 divisors, whose sum is σ = 556565502. Its totient is φ = 556565500.

The previous prime is 556565489. The next prime is 556565509. The reversal of 556565501 is 105565655.

556565501 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 can be written as a sum of positive squares in only one way, i.e., 334853401 + 221712100 = 18299^2 + 14890^2 .

It is a cyclic number.

It is not a de Polignac number, because 556565501 - 2¹⁸ = 556303357 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556565509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278282750 + 278282751.

It is an arithmetic number, because the mean of its divisors is an integer number (278282751).

Almost surely, 2^556565501 is an apocalyptic number.

It is an amenable number.

556565501 is a deficient number, since it is larger than the sum of its proper divisors (1).

556565501 is an equidigital number, since it uses as much as digits as its factorization.

556565501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112500, while the sum is 38.

The square root of 556565501 is about 23591.6404898006. The cubic root of 556565501 is about 822.5685378165.

The spelling of 556565501 in words is "five hundred fifty-six million, five hundred sixty-five thousand, five hundred one".