55508619 has 4 divisors (see below), whose sum is σ = 74011496. Its totient is φ = 37005744.

The previous prime is 55508617. The next prime is 55508627. The reversal of 55508619 is 91680555.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55508619 - 2¹ = 55508617 is a prime.

It is a super-2 number, since 2×55508619² = 6162413566574322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55508617) 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 3 ways as a sum of consecutive naturals, for example, 9251434 + ... + 9251439.

It is an arithmetic number, because the mean of its divisors is an integer number (18502874).

Almost surely, 2^55508619 is an apocalyptic number.

55508619 is a deficient number, since it is larger than the sum of its proper divisors (18502877).

55508619 is a wasteful number, since it uses less digits than its factorization.

55508619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18502876.

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 55508619 is about 7450.4106598227. The cubic root of 55508619 is about 381.4639260207.

The spelling of 55508619 in words is "fifty-five million, five hundred eight thousand, six hundred nineteen".