51155544211 has 2 divisors, whose sum is σ = 51155544212. Its totient is φ = 51155544210.

The previous prime is 51155544137. The next prime is 51155544227. The reversal of 51155544211 is 11244555115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51155544211 - 2¹⁵ = 51155511443 is a prime.

It is a super-2 number, since 2×51155544211² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51155544281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25577772105 + 25577772106.

It is an arithmetic number, because the mean of its divisors is an integer number (25577772106).

Almost surely, 2^51155544211 is an apocalyptic number.

51155544211 is a deficient number, since it is larger than the sum of its proper divisors (1).

51155544211 is an equidigital number, since it uses as much as digits as its factorization.

51155544211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20000, while the sum is 34.

The spelling of 51155544211 in words is "fifty-one billion, one hundred fifty-five million, five hundred forty-four thousand, two hundred eleven".