55318519 has 16 divisors (see below), whose sum is σ = 61401600. Its totient is φ = 49601376.

The previous prime is 55318513. The next prime is 55318531. The reversal of 55318519 is 91581355.

It is a cyclic number.

It is not a de Polignac number, because 55318519 - 2²¹ = 53221367 is a prime.

It is a super-2 number, since 2×55318519² = 6120277088706722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55318513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44397 + ... + 45625.

It is an arithmetic number, because the mean of its divisors is an integer number (3837600).

Almost surely, 2^55318519 is an apocalyptic number.

55318519 is a deficient number, since it is larger than the sum of its proper divisors (6083081).

55318519 is a wasteful number, since it uses less digits than its factorization.

55318519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374.

The product of its digits is 27000, while the sum is 37.

The square root of 55318519 is about 7437.6420322573. The cubic root of 55318519 is about 381.0279623000.

The spelling of 55318519 in words is "fifty-five million, three hundred eighteen thousand, five hundred nineteen".