53517521 has 2 divisors, whose sum is σ = 53517522. Its totient is φ = 53517520.

The previous prime is 53517511. The next prime is 53517539. The reversal of 53517521 is 12571535.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38925121 + 14592400 = 6239^2 + 3820^2 .

It is a cyclic number.

It is not a de Polignac number, because 53517521 - 2¹⁰ = 53516497 is a prime.

It is not a weakly prime, because it can be changed into another prime (53517511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26758760 + 26758761.

It is an arithmetic number, because the mean of its divisors is an integer number (26758761).

Almost surely, 2^53517521 is an apocalyptic number.

It is an amenable number.

53517521 is a deficient number, since it is larger than the sum of its proper divisors (1).

53517521 is an equidigital number, since it uses as much as digits as its factorization.

53517521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5250, while the sum is 29.

The square root of 53517521 is about 7315.5670320215. The cubic root of 53517521 is about 376.8472317593.

The spelling of 53517521 in words is "fifty-three million, five hundred seventeen thousand, five hundred twenty-one".