53201521 has 2 divisors, whose sum is σ = 53201522. Its totient is φ = 53201520.

The previous prime is 53201497. The next prime is 53201527. The reversal of 53201521 is 12510235.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36481600 + 16719921 = 6040^2 + 4089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53201521 is a prime.

It is not a weakly prime, because it can be changed into another prime (53201527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26600760 + 26600761.

It is an arithmetic number, because the mean of its divisors is an integer number (26600761).

Almost surely, 2^53201521 is an apocalyptic number.

It is an amenable number.

53201521 is a deficient number, since it is larger than the sum of its proper divisors (1).

53201521 is an equidigital number, since it uses as much as digits as its factorization.

53201521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 53201521 is about 7293.9372769445. The cubic root of 53201521 is about 376.1040553452.

Adding to 53201521 its reverse (12510235), we get a palindrome (65711756).

The spelling of 53201521 in words is "fifty-three million, two hundred one thousand, five hundred twenty-one".