53765521 has 2 divisors, whose sum is σ = 53765522. Its totient is φ = 53765520.

The previous prime is 53765519. The next prime is 53765533. The reversal of 53765521 is 12556735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52417600 + 1347921 = 7240^2 + 1161^2 .

It is a cyclic number.

It is not a de Polignac number, because 53765521 - 2¹ = 53765519 is a prime.

Together with 53765519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (53765561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26882760 + 26882761.

It is an arithmetic number, because the mean of its divisors is an integer number (26882761).

Almost surely, 2^53765521 is an apocalyptic number.

It is an amenable number.

53765521 is a deficient number, since it is larger than the sum of its proper divisors (1).

53765521 is an equidigital number, since it uses as much as digits as its factorization.

53765521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31500, while the sum is 34.

The square root of 53765521 is about 7332.4975963174. The cubic root of 53765521 is about 377.4284378186.

The spelling of 53765521 in words is "fifty-three million, seven hundred sixty-five thousand, five hundred twenty-one".