51352721668301 has 2 divisors, whose sum is σ = 51352721668302. Its totient is φ = 51352721668300.

The previous prime is 51352721668279. The next prime is 51352721668319. The reversal of 51352721668301 is 10386612725315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27029330652676 + 24323391015625 = 5198974^2 + 4931875^2 .

It is a cyclic number.

It is not a de Polignac number, because 51352721668301 - 2³⁴ = 51335541799117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51352721668301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51352721068301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25676360834150 + 25676360834151.

It is an arithmetic number, because the mean of its divisors is an integer number (25676360834151).

Almost surely, 2^{51352721668301} is an apocalyptic number.

It is an amenable number.

51352721668301 is a deficient number, since it is larger than the sum of its proper divisors (1).

51352721668301 is an equidigital number, since it uses as much as digits as its factorization.

51352721668301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 51352721668301 in words is "fifty-one trillion, three hundred fifty-two billion, seven hundred twenty-one million, six hundred sixty-eight thousand, three hundred one".