1155566051 has 2 divisors, whose sum is σ = 1155566052. Its totient is φ = 1155566050.

The previous prime is 1155566033. The next prime is 1155566053. The reversal of 1155566051 is 1506655511.

It is a strong prime.

It is an emirp because it is prime and its reverse (1506655511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1155566051 - 2¹⁰ = 1155565027 is a prime.

Together with 1155566053, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1155566053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577783025 + 577783026.

It is an arithmetic number, because the mean of its divisors is an integer number (577783026).

Almost surely, 2^1155566051 is an apocalyptic number.

1155566051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155566051 is an equidigital number, since it uses as much as digits as its factorization.

1155566051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22500, while the sum is 35.

The square root of 1155566051 is about 33993.6177980514. The cubic root of 1155566051 is about 1049.3771214246.

The spelling of 1155566051 in words is "one billion, one hundred fifty-five million, five hundred sixty-six thousand, fifty-one".