51101050055509 has 2 divisors, whose sum is σ = 51101050055510. Its totient is φ = 51101050055508.

The previous prime is 51101050055479. The next prime is 51101050055593. The reversal of 51101050055509 is 90555005010115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37317168653284 + 13783881402225 = 6108778^2 + 3712665^2 .

It is a cyclic number.

It is not a de Polignac number, because 51101050055509 - 2¹⁵ = 51101050022741 is a prime.

It is a super-2 number, since 2×51101050055509² (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 (51101050655509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25550525027754 + 25550525027755.

It is an arithmetic number, because the mean of its divisors is an integer number (25550525027755).

Almost surely, 2^{51101050055509} is an apocalyptic number.

It is an amenable number.

51101050055509 is a deficient number, since it is larger than the sum of its proper divisors (1).

51101050055509 is an equidigital number, since it uses as much as digits as its factorization.

51101050055509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28125, while the sum is 37.

The spelling of 51101050055509 in words is "fifty-one trillion, one hundred one billion, fifty million, fifty-five thousand, five hundred nine".