55819219 has 4 divisors (see below), whose sum is σ = 55834920. Its totient is φ = 55803520.

The previous prime is 55819157. The next prime is 55819223. The reversal of 55819219 is 91291855.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55819219 - 2¹³ = 55811027 is a prime.

It is a super-3 number, since 3×55819219³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55819259) 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, 312 + ... + 10570.

It is an arithmetic number, because the mean of its divisors is an integer number (13958730).

Almost surely, 2^55819219 is an apocalyptic number.

55819219 is a deficient number, since it is larger than the sum of its proper divisors (15701).

55819219 is a wasteful number, since it uses less digits than its factorization.

55819219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15700.

The product of its digits is 32400, while the sum is 40.

The square root of 55819219 is about 7471.2260707330. The cubic root of 55819219 is about 382.1741003499.

The spelling of 55819219 in words is "fifty-five million, eight hundred nineteen thousand, two hundred nineteen".