53520217 has 2 divisors, whose sum is σ = 53520218. Its totient is φ = 53520216.

The previous prime is 53520191. The next prime is 53520221. The reversal of 53520217 is 71202535.

53520217 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., 49970761 + 3549456 = 7069^2 + 1884^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53520217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53520191 and 53520200.

It is not a weakly prime, because it can be changed into another prime (53520227) 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, 26760108 + 26760109.

It is an arithmetic number, because the mean of its divisors is an integer number (26760109).

Almost surely, 2^53520217 is an apocalyptic number.

It is an amenable number.

53520217 is a deficient number, since it is larger than the sum of its proper divisors (1).

53520217 is an equidigital number, since it uses as much as digits as its factorization.

53520217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 53520217 is about 7315.7512942964. The cubic root of 53520217 is about 376.8535596749.

The spelling of 53520217 in words is "fifty-three million, five hundred twenty thousand, two hundred seventeen".