53556521 has 2 divisors, whose sum is σ = 53556522. Its totient is φ = 53556520.

The previous prime is 53556473. The next prime is 53556527. The reversal of 53556521 is 12565535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44622400 + 8934121 = 6680^2 + 2989^2 .

It is a cyclic number.

It is not a de Polignac number, because 53556521 - 2¹⁰ = 53555497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53556527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26778260 + 26778261.

It is an arithmetic number, because the mean of its divisors is an integer number (26778261).

Almost surely, 2^53556521 is an apocalyptic number.

It is an amenable number.

53556521 is a deficient number, since it is larger than the sum of its proper divisors (1).

53556521 is an equidigital number, since it uses as much as digits as its factorization.

53556521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22500, while the sum is 32.

The square root of 53556521 is about 7318.2320952536. The cubic root of 53556521 is about 376.9387499084.

The spelling of 53556521 in words is "fifty-three million, five hundred fifty-six thousand, five hundred twenty-one".