55220101 has 2 divisors, whose sum is σ = 55220102. Its totient is φ = 55220100.

The previous prime is 55220069. The next prime is 55220107. The reversal of 55220101 is 10102255.

55220101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45887076 + 9333025 = 6774^2 + 3055^2 .

It is a cyclic number.

It is not a de Polignac number, because 55220101 - 2⁵ = 55220069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55220107) 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 as a sum of consecutive naturals, namely, 27610050 + 27610051.

It is an arithmetic number, because the mean of its divisors is an integer number (27610051).

Almost surely, 2^55220101 is an apocalyptic number.

It is an amenable number.

55220101 is a deficient number, since it is larger than the sum of its proper divisors (1).

55220101 is an equidigital number, since it uses as much as digits as its factorization.

55220101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 55220101 is about 7431.0228771011. The cubic root of 55220101 is about 380.8018639902.

Adding to 55220101 its reverse (10102255), we get a palindrome (65322356).

The spelling of 55220101 in words is "fifty-five million, two hundred twenty thousand, one hundred one".