55122617 has 4 divisors (see below), whose sum is σ = 60133776. Its totient is φ = 50111460.

The previous prime is 55122611. The next prime is 55122647. The reversal of 55122617 is 71622155.

55122617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55122617 - 2⁴ = 55122601 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 55122617.

It is not an unprimeable number, because it can be changed into a prime (55122611) 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 3 ways as a sum of consecutive naturals, for example, 2505563 + ... + 2505584.

It is an arithmetic number, because the mean of its divisors is an integer number (15033444).

Almost surely, 2^55122617 is an apocalyptic number.

It is an amenable number.

55122617 is a deficient number, since it is larger than the sum of its proper divisors (5011159).

55122617 is a wasteful number, since it uses less digits than its factorization.

55122617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011158.

The product of its digits is 4200, while the sum is 29.

The square root of 55122617 is about 7424.4607211568. The cubic root of 55122617 is about 380.5776463928.

The spelling of 55122617 in words is "fifty-five million, one hundred twenty-two thousand, six hundred seventeen".