55130109 has 4 divisors (see below), whose sum is σ = 73506816. Its totient is φ = 36753404.

The previous prime is 55130063. The next prime is 55130161. The reversal of 55130109 is 90103155.

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 55130109 - 2⁷ = 55129981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55130209) 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, 9188349 + ... + 9188354.

It is an arithmetic number, because the mean of its divisors is an integer number (18376704).

Almost surely, 2^55130109 is an apocalyptic number.

It is an amenable number.

55130109 is a deficient number, since it is larger than the sum of its proper divisors (18376707).

55130109 is a wasteful number, since it uses less digits than its factorization.

55130109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18376706.

The product of its (nonzero) digits is 675, while the sum is 24.

The square root of 55130109 is about 7424.9652524439. The cubic root of 55130109 is about 380.5948877038.

The spelling of 55130109 in words is "fifty-five million, one hundred thirty thousand, one hundred nine".