55686419 has 4 divisors (see below), whose sum is σ = 56981496. Its totient is φ = 54391344.

The previous prime is 55686403. The next prime is 55686431. The reversal of 55686419 is 91468655.

55686419 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91468655 = 5 ⋅18293731.

It is a cyclic number.

It is not a de Polignac number, because 55686419 - 2⁴ = 55686403 is a prime.

It is a super-2 number, since 2×55686419² = 6201954522087122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55686419.

It is not an unprimeable number, because it can be changed into a prime (55686919) 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 in 3 ways as a sum of consecutive naturals, for example, 647474 + ... + 647559.

It is an arithmetic number, because the mean of its divisors is an integer number (14245374).

Almost surely, 2^55686419 is an apocalyptic number.

55686419 is a deficient number, since it is larger than the sum of its proper divisors (1295077).

55686419 is a wasteful number, since it uses less digits than its factorization.

55686419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295076.

The product of its digits is 259200, while the sum is 44.

The square root of 55686419 is about 7462.3333482229. Note that the first 4 decimals coincide. The cubic root of 55686419 is about 381.8707817471.

The spelling of 55686419 in words is "fifty-five million, six hundred eighty-six thousand, four hundred nineteen".