51527044021 has 2 divisors, whose sum is σ = 51527044022. Its totient is φ = 51527044020.

The previous prime is 51527043991. The next prime is 51527044027. The reversal of 51527044021 is 12044072515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50215879921 + 1311164100 = 224089^2 + 36210^2 .

It is a cyclic number.

It is not a de Polignac number, because 51527044021 - 2⁹ = 51527043509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51527044027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25763522010 + 25763522011.

It is an arithmetic number, because the mean of its divisors is an integer number (25763522011).

Almost surely, 2^51527044021 is an apocalyptic number.

It is an amenable number.

51527044021 is a deficient number, since it is larger than the sum of its proper divisors (1).

51527044021 is an equidigital number, since it uses as much as digits as its factorization.

51527044021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11200, while the sum is 31.

The spelling of 51527044021 in words is "fifty-one billion, five hundred twenty-seven million, forty-four thousand, twenty-one".