53443100521 has 2 divisors, whose sum is σ = 53443100522. Its totient is φ = 53443100520.

The previous prime is 53443100489. The next prime is 53443100527. The reversal of 53443100521 is 12500134435.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30272172121 + 23170928400 = 173989^2 + 152220^2 .

It is a cyclic number.

It is not a de Polignac number, because 53443100521 - 2⁵ = 53443100489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53443100521.

It is not a weakly prime, because it can be changed into another prime (53443100527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26721550260 + 26721550261.

It is an arithmetic number, because the mean of its divisors is an integer number (26721550261).

Almost surely, 2^53443100521 is an apocalyptic number.

It is an amenable number.

53443100521 is a deficient number, since it is larger than the sum of its proper divisors (1).

53443100521 is an equidigital number, since it uses as much as digits as its factorization.

53443100521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 53443100521 its reverse (12500134435), we get a palindrome (65943234956).

The spelling of 53443100521 in words is "fifty-three billion, four hundred forty-three million, one hundred thousand, five hundred twenty-one".