55548919 has 2 divisors, whose sum is σ = 55548920. Its totient is φ = 55548918.

The previous prime is 55548917. The next prime is 55548937. The reversal of 55548919 is 91984555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55548919 - 2¹ = 55548917 is a prime.

It is a super-2 number, since 2×55548919² = 6171364804137122, which contains 22 as substring.

Together with 55548917, 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 (55548917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27774459 + 27774460.

It is an arithmetic number, because the mean of its divisors is an integer number (27774460).

Almost surely, 2^55548919 is an apocalyptic number.

55548919 is a deficient number, since it is larger than the sum of its proper divisors (1).

55548919 is an equidigital number, since it uses as much as digits as its factorization.

55548919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324000, while the sum is 46.

The square root of 55548919 is about 7453.1147180223. The cubic root of 55548919 is about 381.5562196601.

The spelling of 55548919 in words is "fifty-five million, five hundred forty-eight thousand, nine hundred nineteen".