53502521 has 2 divisors, whose sum is σ = 53502522. Its totient is φ = 53502520.

The previous prime is 53502487. The next prime is 53502539. The reversal of 53502521 is 12520535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53290000 + 212521 = 7300^2 + 461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53502521 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (53502571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26751260 + 26751261.

It is an arithmetic number, because the mean of its divisors is an integer number (26751261).

Almost surely, 2^53502521 is an apocalyptic number.

It is an amenable number.

53502521 is a deficient number, since it is larger than the sum of its proper divisors (1).

53502521 is an equidigital number, since it uses as much as digits as its factorization.

53502521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 53502521 is about 7314.5417491460. The cubic root of 53502521 is about 376.8120206323.

The spelling of 53502521 in words is "fifty-three million, five hundred two thousand, five hundred twenty-one".