53331077521 has 2 divisors, whose sum is σ = 53331077522. Its totient is φ = 53331077520.

The previous prime is 53331077479. The next prime is 53331077551. The reversal of 53331077521 is 12577013335.

53331077521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39083313025 + 14247764496 = 197695^2 + 119364^2 .

It is a cyclic number.

It is not a de Polignac number, because 53331077521 - 2¹⁹ = 53330553233 is a prime.

It is not a weakly prime, because it can be changed into another prime (53331077551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26665538760 + 26665538761.

It is an arithmetic number, because the mean of its divisors is an integer number (26665538761).

Almost surely, 2^53331077521 is an apocalyptic number.

It is an amenable number.

53331077521 is a deficient number, since it is larger than the sum of its proper divisors (1).

53331077521 is an equidigital number, since it uses as much as digits as its factorization.

53331077521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 66150, while the sum is 37.

The spelling of 53331077521 in words is "fifty-three billion, three hundred thirty-one million, seventy-seven thousand, five hundred twenty-one".