55999219 has 4 divisors (see below), whose sum is σ = 56032344. Its totient is φ = 55966096.

The previous prime is 55999211. The next prime is 55999267. The reversal of 55999219 is 91299955.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91299955 = 5 ⋅18259991.

It is a cyclic number.

It is not a de Polignac number, because 55999219 - 2³ = 55999211 is a prime.

It is a super-2 number, since 2×55999219² = 6271825057219922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55999211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13882 + ... + 17455.

It is an arithmetic number, because the mean of its divisors is an integer number (14008086).

Almost surely, 2^55999219 is an apocalyptic number.

55999219 is a deficient number, since it is larger than the sum of its proper divisors (33125).

55999219 is a wasteful number, since it uses less digits than its factorization.

55999219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33124.

The product of its digits is 328050, while the sum is 49.

The square root of 55999219 is about 7483.2625906085. The cubic root of 55999219 is about 382.5844579757.

The spelling of 55999219 in words is "fifty-five million, nine hundred ninety-nine thousand, two hundred nineteen".