55065619 has 4 divisors (see below), whose sum is σ = 62932144. Its totient is φ = 47199096.

The previous prime is 55065587. The next prime is 55065631. The reversal of 55065619 is 91656055.

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

It is not a de Polignac number, because 55065619 - 2⁵ = 55065587 is a prime.

It is a super-2 number, since 2×55065619² = 6064444791706322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55065649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3933252 + ... + 3933265.

It is an arithmetic number, because the mean of its divisors is an integer number (15733036).

Almost surely, 2^55065619 is an apocalyptic number.

55065619 is a deficient number, since it is larger than the sum of its proper divisors (7866525).

55065619 is an equidigital number, since it uses as much as digits as its factorization.

55065619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7866524.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 55065619 is about 7420.6212004117. The cubic root of 55065619 is about 380.4464259314.

The spelling of 55065619 in words is "fifty-five million, sixty-five thousand, six hundred nineteen".