55005019 has 4 divisors (see below), whose sum is σ = 57900040. Its totient is φ = 52110000.

The previous prime is 55005011. The next prime is 55005023. The reversal of 55005019 is 91050055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91050055 = 5 ⋅18210011.

It is a cyclic number.

It is not a de Polignac number, because 55005019 - 2³ = 55005011 is a prime.

It is a super-2 number, since 2×55005019² = 6051104230380722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55004984 and 55005002.

It is not an unprimeable number, because it can be changed into a prime (55005011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1447482 + ... + 1447519.

It is an arithmetic number, because the mean of its divisors is an integer number (14475010).

Almost surely, 2^55005019 is an apocalyptic number.

55005019 is a deficient number, since it is larger than the sum of its proper divisors (2895021).

55005019 is a wasteful number, since it uses less digits than its factorization.

55005019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895020.

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 55005019 is about 7416.5368602873. The cubic root of 55005019 is about 380.3068136142.

The spelling of 55005019 in words is "fifty-five million, five thousand, nineteen".