55405249 has 2 divisors, whose sum is σ = 55405250. Its totient is φ = 55405248.

The previous prime is 55405247. The next prime is 55405279. The reversal of 55405249 is 94250455.

It is a happy number.

55405249 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 can be written as a sum of positive squares in only one way, i.e., 31080625 + 24324624 = 5575^2 + 4932^2 .

It is a cyclic number.

It is not a de Polignac number, because 55405249 - 2¹ = 55405247 is a prime.

Together with 55405247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55405247) 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, 27702624 + 27702625.

It is an arithmetic number, because the mean of its divisors is an integer number (27702625).

Almost surely, 2^55405249 is an apocalyptic number.

It is an amenable number.

55405249 is a deficient number, since it is larger than the sum of its proper divisors (1).

55405249 is an equidigital number, since it uses as much as digits as its factorization.

55405249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 55405249 is about 7443.4702256407. The cubic root of 55405249 is about 381.2269872699.

The spelling of 55405249 in words is "fifty-five million, four hundred five thousand, two hundred forty-nine".