55150321 has 2 divisors, whose sum is σ = 55150322. Its totient is φ = 55150320.

The previous prime is 55150301. The next prime is 55150327. The reversal of 55150321 is 12305155.

55150321 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., 45158400 + 9991921 = 6720^2 + 3161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55150321 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55150292 and 55150301.

It is not a weakly prime, because it can be changed into another prime (55150327) 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, 27575160 + 27575161.

It is an arithmetic number, because the mean of its divisors is an integer number (27575161).

Almost surely, 2^55150321 is an apocalyptic number.

It is an amenable number.

55150321 is a deficient number, since it is larger than the sum of its proper divisors (1).

55150321 is an equidigital number, since it uses as much as digits as its factorization.

55150321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 55150321 is about 7426.3262115261. The cubic root of 55150321 is about 380.6413937124.

Adding to 55150321 its reverse (12305155), we get a palindrome (67455476).

The spelling of 55150321 in words is "fifty-five million, one hundred fifty thousand, three hundred twenty-one".