53130521 has 2 divisors, whose sum is σ = 53130522. Its totient is φ = 53130520.

The previous prime is 53130509. The next prime is 53130533. The reversal of 53130521 is 12503135.

53130521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (53130509) and next prime (53130533).

It can be written as a sum of positive squares in only one way, i.e., 44368921 + 8761600 = 6661^2 + 2960^2 .

It is a cyclic number.

It is not a de Polignac number, because 53130521 - 2¹⁰ = 53129497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53130493 and 53130502.

It is not a weakly prime, because it can be changed into another prime (53130421) 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, 26565260 + 26565261.

It is an arithmetic number, because the mean of its divisors is an integer number (26565261).

Almost surely, 2^53130521 is an apocalyptic number.

It is an amenable number.

53130521 is a deficient number, since it is larger than the sum of its proper divisors (1).

53130521 is an equidigital number, since it uses as much as digits as its factorization.

53130521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 53130521 is about 7289.0685961925. The cubic root of 53130521 is about 375.9366711850.

Adding to 53130521 its reverse (12503135), we get a palindrome (65633656).

The spelling of 53130521 in words is "fifty-three million, one hundred thirty thousand, five hundred twenty-one".