51007819 has 2 divisors, whose sum is σ = 51007820. Its totient is φ = 51007818.

The previous prime is 51007811. The next prime is 51007829. The reversal of 51007819 is 91870015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51007819 - 2³ = 51007811 is a prime.

It is a super-2 number, since 2×51007819² = 5203595198273522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51007811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25503909 + 25503910.

It is an arithmetic number, because the mean of its divisors is an integer number (25503910).

Almost surely, 2^51007819 is an apocalyptic number.

51007819 is a deficient number, since it is larger than the sum of its proper divisors (1).

51007819 is an equidigital number, since it uses as much as digits as its factorization.

51007819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 51007819 is about 7141.9758470608. The cubic root of 51007819 is about 370.8619277310.

The spelling of 51007819 in words is "fifty-one million, seven thousand, eight hundred nineteen".