55555019 has 8 divisors (see below), whose sum is σ = 61446000. Its totient is φ = 49895136.

The previous prime is 55555013. The next prime is 55555033. The reversal of 55555019 is 91055555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55555019 - 2¹² = 55550923 is a prime.

It is a super-2 number, since 2×55555019² = 6172720272180722, 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 55555019.

It is not an unprimeable number, because it can be changed into a prime (55555013) 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 7 ways as a sum of consecutive naturals, for example, 57269 + ... + 58230.

It is an arithmetic number, because the mean of its divisors is an integer number (7680750).

Almost surely, 2^55555019 is an apocalyptic number.

55555019 is a deficient number, since it is larger than the sum of its proper divisors (5890981).

55555019 is a wasteful number, since it uses less digits than its factorization.

55555019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115549.

The product of its (nonzero) digits is 28125, while the sum is 35.

The square root of 55555019 is about 7453.5239316715. The cubic root of 55555019 is about 381.5701857749.

The spelling of 55555019 in words is "fifty-five million, five hundred fifty-five thousand, nineteen".