55550019 has 8 divisors (see below), whose sum is σ = 84647680. Its totient is φ = 31742856.

The previous prime is 55550017. The next prime is 55550021. The reversal of 55550019 is 91005555.

It is an interprime number because it is at equal distance from previous prime (55550017) and next prime (55550021).

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

It is not a de Polignac number, because 55550019 - 2¹ = 55550017 is a prime.

It is a super-2 number, since 2×55550019² = 6171609221800722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55550017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1322599 + ... + 1322640.

It is an arithmetic number, because the mean of its divisors is an integer number (10580960).

Almost surely, 2^55550019 is an apocalyptic number.

55550019 is a deficient number, since it is larger than the sum of its proper divisors (29097661).

55550019 is a wasteful number, since it uses less digits than its factorization.

55550019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645249.

The product of its (nonzero) digits is 5625, while the sum is 30.

The square root of 55550019 is about 7453.1885123080. The cubic root of 55550019 is about 381.5587382153.

The spelling of 55550019 in words is "fifty-five million, five hundred fifty thousand, nineteen".