53263233521 has 2 divisors, whose sum is σ = 53263233522. Its totient is φ = 53263233520.

The previous prime is 53263233497. The next prime is 53263233523. The reversal of 53263233521 is 12533236235.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52184833600 + 1078399921 = 228440^2 + 32839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53263233521 is a prime.

It is a super-2 number, since 2×53263233521² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 53263233523, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (53263233523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26631616760 + 26631616761.

It is an arithmetic number, because the mean of its divisors is an integer number (26631616761).

Almost surely, 2^53263233521 is an apocalyptic number.

It is an amenable number.

53263233521 is a deficient number, since it is larger than the sum of its proper divisors (1).

53263233521 is an equidigital number, since it uses as much as digits as its factorization.

53263233521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 35.

Adding to 53263233521 its reverse (12533236235), we get a palindrome (65796469756).

The spelling of 53263233521 in words is "fifty-three billion, two hundred sixty-three million, two hundred thirty-three thousand, five hundred twenty-one".