55689219 has 24 divisors (see below), whose sum is σ = 82734912. Its totient is φ = 36078720.

The previous prime is 55689203. The next prime is 55689241. The reversal of 55689219 is 91298655.

55689219 is a `hidden beast` number, since 556 + 8 + 92 + 1 + 9 = 666.

It is not a de Polignac number, because 55689219 - 2⁴ = 55689203 is a prime.

It is a super-2 number, since 2×55689219² = 6202578225659922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55689259) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72799 + ... + 73559.

It is an arithmetic number, because the mean of its divisors is an integer number (3447288).

Almost surely, 2^55689219 is an apocalyptic number.

55689219 is a deficient number, since it is larger than the sum of its proper divisors (27045693).

55689219 is a wasteful number, since it uses less digits than its factorization.

55689219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987 (or 984 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 55689219 is about 7462.5209547444. The cubic root of 55689219 is about 381.8771819927.

The spelling of 55689219 in words is "fifty-five million, six hundred eighty-nine thousand, two hundred nineteen".