55072206 has 48 divisors (see below), whose sum is σ = 140066784. Its totient is φ = 15308352.

The previous prime is 55072201. The next prime is 55072289. The reversal of 55072206 is 60227055.

55072206 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55072206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55072201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1245 + ... + 10568.

It is an arithmetic number, because the mean of its divisors is an integer number (2918058).

Almost surely, 2^55072206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55072206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70033392).

55072206 is an abundant number, since it is smaller than the sum of its proper divisors (84994578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55072206 is a wasteful number, since it uses less digits than its factorization.

55072206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11865 (or 11862 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 55072206 is about 7421.0650179068. The cubic root of 55072206 is about 380.4615951103.

It can be divided in two parts, 55072 and 206, that added together give a triangular number (55278 = T₃₃₂).

The spelling of 55072206 in words is "fifty-five million, seventy-two thousand, two hundred six".