51321964684231 has 2 divisors, whose sum is σ = 51321964684232. Its totient is φ = 51321964684230.

The previous prime is 51321964684201. The next prime is 51321964684261. The reversal of 51321964684231 is 13248646912315.

It is a balanced prime because it is at equal distance from previous prime (51321964684201) and next prime (51321964684261).

It is a cyclic number.

It is not a de Polignac number, because 51321964684231 - 2¹⁷ = 51321964553159 is a prime.

It is a super-2 number, since 2×51321964684231² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51321964684201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25660982342115 + 25660982342116.

It is an arithmetic number, because the mean of its divisors is an integer number (25660982342116).

Almost surely, 2^{51321964684231} is an apocalyptic number.

51321964684231 is a deficient number, since it is larger than the sum of its proper divisors (1).

51321964684231 is an equidigital number, since it uses as much as digits as its factorization.

51321964684231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7464960, while the sum is 55.

The spelling of 51321964684231 in words is "fifty-one trillion, three hundred twenty-one billion, nine hundred sixty-four million, six hundred eighty-four thousand, two hundred thirty-one".