51084225259681 has 2 divisors, whose sum is σ = 51084225259682. Its totient is φ = 51084225259680.

The previous prime is 51084225259667. The next prime is 51084225259687. The reversal of 51084225259681 is 18695252248015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43872938032225 + 7211287227456 = 6623665^2 + 2685384^2 .

It is a cyclic number.

It is not a de Polignac number, because 51084225259681 - 2¹⁵ = 51084225226913 is a prime.

It is a super-2 number, since 2×51084225259681² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51084225259687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25542112629840 + 25542112629841.

It is an arithmetic number, because the mean of its divisors is an integer number (25542112629841).

Almost surely, 2^{51084225259681} is an apocalyptic number.

It is an amenable number.

51084225259681 is a deficient number, since it is larger than the sum of its proper divisors (1).

51084225259681 is an equidigital number, since it uses as much as digits as its factorization.

51084225259681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824000, while the sum is 58.

The spelling of 51084225259681 in words is "fifty-one trillion, eighty-four billion, two hundred twenty-five million, two hundred fifty-nine thousand, six hundred eighty-one".