55919207 has 2 divisors, whose sum is σ = 55919208. Its totient is φ = 55919206.

The previous prime is 55919191. The next prime is 55919209. The reversal of 55919207 is 70291955.

55919207 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 is a cyclic number.

It is not a de Polignac number, because 55919207 - 2⁴ = 55919191 is a prime.

Together with 55919209, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55919209) 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, 27959603 + 27959604.

It is an arithmetic number, because the mean of its divisors is an integer number (27959604).

Almost surely, 2^55919207 is an apocalyptic number.

55919207 is a deficient number, since it is larger than the sum of its proper divisors (1).

55919207 is an equidigital number, since it uses as much as digits as its factorization.

55919207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 55919207 is about 7477.9146157201. The cubic root of 55919207 is about 382.4021581805.

The spelling of 55919207 in words is "fifty-five million, nine hundred nineteen thousand, two hundred seven".