51321964684201 has 2 divisors, whose sum is σ = 51321964684202. Its totient is φ = 51321964684200.

The previous prime is 51321964684181. The next prime is 51321964684231. The reversal of 51321964684201 is 10248646912315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29256210027801 + 22065754656400 = 5408901^2 + 4697420^2 .

It is a cyclic number.

It is not a de Polignac number, because 51321964684201 - 2⁴³ = 42525871661993 is a prime.

It is not a weakly prime, because it can be changed into another prime (51321964684231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25660982342100 + 25660982342101.

It is an arithmetic number, because the mean of its divisors is an integer number (25660982342101).

Almost surely, 2^{51321964684201} is an apocalyptic number.

It is an amenable number.

51321964684201 is a deficient number, since it is larger than the sum of its proper divisors (1).

51321964684201 is an equidigital number, since it uses as much as digits as its factorization.

51321964684201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 51321964684201 in words is "fifty-one trillion, three hundred twenty-one billion, nine hundred sixty-four million, six hundred eighty-four thousand, two hundred one".