55805207 has 2 divisors, whose sum is σ = 55805208. Its totient is φ = 55805206.

The previous prime is 55805201. The next prime is 55805231. The reversal of 55805207 is 70250855.

It is a happy number.

55805207 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55805207 - 2²⁴ = 39027991 is a prime.

It is a super-2 number, since 2×55805207² = 6228442256625698, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55805201) 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, 27902603 + 27902604.

It is an arithmetic number, because the mean of its divisors is an integer number (27902604).

Almost surely, 2^55805207 is an apocalyptic number.

55805207 is a deficient number, since it is larger than the sum of its proper divisors (1).

55805207 is an equidigital number, since it uses as much as digits as its factorization.

55805207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 55805207 is about 7470.2882809166. The cubic root of 55805207 is about 382.1421193003.

The spelling of 55805207 in words is "fifty-five million, eight hundred five thousand, two hundred seven".