55106620 has 24 divisors (see below), whose sum is σ = 120756384. Its totient is φ = 21084096.

The previous prime is 55106617. The next prime is 55106621. The reversal of 55106620 is 2660155.

55106620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×55106620³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55106621) 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 7 ways as a sum of consecutive naturals, for example, 59439 + ... + 60358.

It is an arithmetic number, because the mean of its divisors is an integer number (5031516).

Almost surely, 2^55106620 is an apocalyptic number.

It is an amenable number.

55106620 is an abundant number, since it is smaller than the sum of its proper divisors (65649764).

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

55106620 is a wasteful number, since it uses less digits than its factorization.

55106620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119829 (or 119827 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 55106620 is about 7423.3833256811. The cubic root of 55106620 is about 380.5408273279.

Adding to 55106620 its reverse (2660155), we get a palindrome (57766775).

The spelling of 55106620 in words is "fifty-five million, one hundred six thousand, six hundred twenty".