55105205 has 4 divisors (see below), whose sum is σ = 66126252. Its totient is φ = 44084160.

The previous prime is 55105201. The next prime is 55105207. The reversal of 55105205 is 50250155.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8305924 + 46799281 = 2882^2 + 6841^2 .

It is not a de Polignac number, because 55105205 - 2² = 55105201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55105201) 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, 5510516 + ... + 5510525.

It is an arithmetic number, because the mean of its divisors is an integer number (16531563).

Almost surely, 2^55105205 is an apocalyptic number.

It is an amenable number.

55105205 is a deficient number, since it is larger than the sum of its proper divisors (11021047).

55105205 is a wasteful number, since it uses less digits than its factorization.

55105205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11021046.

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 55105205 is about 7423.2880181224. The cubic root of 55105205 is about 380.5375701881.

The spelling of 55105205 in words is "fifty-five million, one hundred five thousand, two hundred five".