555243109 has 2 divisors, whose sum is σ = 555243110. Its totient is φ = 555243108.

The previous prime is 555243079. The next prime is 555243113. The reversal of 555243109 is 901342555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295324225 + 259918884 = 17185^2 + 16122^2 .

It is a cyclic number.

It is not a de Polignac number, because 555243109 - 2¹⁹ = 554718821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555243509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277621554 + 277621555.

It is an arithmetic number, because the mean of its divisors is an integer number (277621555).

Almost surely, 2^555243109 is an apocalyptic number.

It is an amenable number.

555243109 is a deficient number, since it is larger than the sum of its proper divisors (1).

555243109 is an equidigital number, since it uses as much as digits as its factorization.

555243109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 555243109 is about 23563.5971150417. The cubic root of 555243109 is about 821.9165506498.

The spelling of 555243109 in words is "five hundred fifty-five million, two hundred forty-three thousand, one hundred nine".