51211019 has 2 divisors, whose sum is σ = 51211020. Its totient is φ = 51211018.

The previous prime is 51211007. The next prime is 51211031. The reversal of 51211019 is 91011215.

51211019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (51211007) and next prime (51211031).

It is a cyclic number.

It is not a de Polignac number, because 51211019 - 2²⁰ = 50162443 is a prime.

It is a super-2 number, since 2×51211019² = 5245136934036722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51211049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25605509 + 25605510.

It is an arithmetic number, because the mean of its divisors is an integer number (25605510).

Almost surely, 2^51211019 is an apocalyptic number.

51211019 is a deficient number, since it is larger than the sum of its proper divisors (1).

51211019 is an equidigital number, since it uses as much as digits as its factorization.

51211019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 51211019 is about 7156.1874626088. The cubic root of 51211019 is about 371.3537431467.

The spelling of 51211019 in words is "fifty-one million, two hundred eleven thousand, nineteen".