55620203 has 2 divisors, whose sum is σ = 55620204. Its totient is φ = 55620202.

The previous prime is 55620181. The next prime is 55620263. The reversal of 55620203 is 30202655.

It is a happy number.

55620203 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 is a cyclic number.

It is not a de Polignac number, because 55620203 - 2⁸ = 55619947 is a prime.

It is a super-2 number, since 2×55620203² = 6187213963522418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55620263) 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, 27810101 + 27810102.

It is an arithmetic number, because the mean of its divisors is an integer number (27810102).

Almost surely, 2^55620203 is an apocalyptic number.

55620203 is a deficient number, since it is larger than the sum of its proper divisors (1).

55620203 is an equidigital number, since it uses as much as digits as its factorization.

55620203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 55620203 is about 7457.8953465438. The cubic root of 55620203 is about 381.7193625132.

Adding to 55620203 its reverse (30202655), we get a palindrome (85822858).

The spelling of 55620203 in words is "fifty-five million, six hundred twenty thousand, two hundred three".