55822889 has 2 divisors, whose sum is σ = 55822890. Its totient is φ = 55822888.

The previous prime is 55822861. The next prime is 55822891. The reversal of 55822889 is 98822855.

It is a happy number.

55822889 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., 47499664 + 8323225 = 6892^2 + 2885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55822889 is a prime.

Together with 55822891, 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 (55822489) 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, 27911444 + 27911445.

It is an arithmetic number, because the mean of its divisors is an integer number (27911445).

Almost surely, 2^55822889 is an apocalyptic number.

It is an amenable number.

55822889 is a deficient number, since it is larger than the sum of its proper divisors (1).

55822889 is an equidigital number, since it uses as much as digits as its factorization.

55822889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 460800, while the sum is 47.

The square root of 55822889 is about 7471.4716756473. The cubic root of 55822889 is about 382.1824758894.

The spelling of 55822889 in words is "fifty-five million, eight hundred twenty-two thousand, eight hundred eighty-nine".