1110055561 has 2 divisors, whose sum is σ = 1110055562. Its totient is φ = 1110055560.

The previous prime is 1110055547. The next prime is 1110055567. The reversal of 1110055561 is 1655500111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1103501961 + 6553600 = 33219^2 + 2560^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110055561 - 2¹⁹ = 1109531273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1110055567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555027780 + 555027781.

It is an arithmetic number, because the mean of its divisors is an integer number (555027781).

Almost surely, 2^1110055561 is an apocalyptic number.

It is an amenable number.

1110055561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110055561 is an equidigital number, since it uses as much as digits as its factorization.

1110055561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 750, while the sum is 25.

The square root of 1110055561 is about 33317.4963195016. The cubic root of 1110055561 is about 1035.4160807737.

Adding to 1110055561 its reverse (1655500111), we get a palindrome (2765555672).

The spelling of 1110055561 in words is "one billion, one hundred ten million, fifty-five thousand, five hundred sixty-one".