55125205 has 4 divisors (see below), whose sum is σ = 66150252. Its totient is φ = 44100160.

The previous prime is 55125199. The next prime is 55125221. The reversal of 55125205 is 50252155.

It is a happy number.

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 35117476 + 20007729 = 5926^2 + 4473^2 .

It is a de Polignac number, because none of the positive numbers 2^k-55125205 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55125205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5512516 + ... + 5512525.

It is an arithmetic number, because the mean of its divisors is an integer number (16537563).

Almost surely, 2^55125205 is an apocalyptic number.

It is an amenable number.

55125205 is a deficient number, since it is larger than the sum of its proper divisors (11025047).

55125205 is a wasteful number, since it uses less digits than its factorization.

55125205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11025046.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 55125205 is about 7424.6350078640. The cubic root of 55125205 is about 380.5836023239.

The spelling of 55125205 in words is "fifty-five million, one hundred twenty-five thousand, two hundred five".