55056569 has 2 divisors, whose sum is σ = 55056570. Its totient is φ = 55056568.

The previous prime is 55056539. The next prime is 55056571. The reversal of 55056569 is 96565055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55056400 + 169 = 7420^2 + 13^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55056569 is a prime.

It is a super-2 number, since 2×55056569² = 6062451580103522, which contains 22 as substring.

Together with 55056571, 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 (55056539) 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, 27528284 + 27528285.

It is an arithmetic number, because the mean of its divisors is an integer number (27528285).

Almost surely, 2^55056569 is an apocalyptic number.

It is an amenable number.

55056569 is a deficient number, since it is larger than the sum of its proper divisors (1).

55056569 is an equidigital number, since it uses as much as digits as its factorization.

55056569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 202500, while the sum is 41.

The square root of 55056569 is about 7420.0113881314. The cubic root of 55056569 is about 380.4255827455.

The spelling of 55056569 in words is "fifty-five million, fifty-six thousand, five hundred sixty-nine".