55082009 has 4 divisors (see below), whose sum is σ = 56858880. Its totient is φ = 53305140.

The previous prime is 55081997. The next prime is 55082017. The reversal of 55082009 is 90028055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55082009 - 2⁴ = 55081993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55082809) 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, 888389 + ... + 888450.

It is an arithmetic number, because the mean of its divisors is an integer number (14214720).

Almost surely, 2^55082009 is an apocalyptic number.

It is an amenable number.

55082009 is a deficient number, since it is larger than the sum of its proper divisors (1776871).

55082009 is a wasteful number, since it uses less digits than its factorization.

55082009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776870.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 55082009 is about 7421.7254732306. The cubic root of 55082009 is about 380.4841681649.

The spelling of 55082009 in words is "fifty-five million, eighty-two thousand, nine".