55420201 has 2 divisors, whose sum is σ = 55420202. Its totient is φ = 55420200.

The previous prime is 55420193. The next prime is 55420229. The reversal of 55420201 is 10202455.

55420201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45212176 + 10208025 = 6724^2 + 3195^2 .

It is a cyclic number.

It is not a de Polignac number, because 55420201 - 2³ = 55420193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55420241) 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, 27710100 + 27710101.

It is an arithmetic number, because the mean of its divisors is an integer number (27710101).

Almost surely, 2^55420201 is an apocalyptic number.

It is an amenable number.

55420201 is a deficient number, since it is larger than the sum of its proper divisors (1).

55420201 is an equidigital number, since it uses as much as digits as its factorization.

55420201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 55420201 is about 7444.4745281316. The cubic root of 55420201 is about 381.2612776024.

Adding to 55420201 its reverse (10202455), we get a palindrome (65622656).

The spelling of 55420201 in words is "fifty-five million, four hundred twenty thousand, two hundred one".