55511219 has 2 divisors, whose sum is σ = 55511220. Its totient is φ = 55511218.

The previous prime is 55511207. The next prime is 55511221. The reversal of 55511219 is 91211555.

55511219 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 a de Polignac number, because none of the positive numbers 2^k-55511219 is a prime.

It is a super-2 number, since 2×55511219² = 6162990869731922, which contains 22 as substring.

Together with 55511221, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55511191 and 55511200.

It is not a weakly prime, because it can be changed into another prime (55541219) 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, 27755609 + 27755610.

It is an arithmetic number, because the mean of its divisors is an integer number (27755610).

Almost surely, 2^55511219 is an apocalyptic number.

55511219 is a deficient number, since it is larger than the sum of its proper divisors (1).

55511219 is an equidigital number, since it uses as much as digits as its factorization.

55511219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2250, while the sum is 29.

The square root of 55511219 is about 7450.5851448057. The cubic root of 55511219 is about 381.4698817969.

The spelling of 55511219 in words is "fifty-five million, five hundred eleven thousand, two hundred nineteen".