51105619 has 2 divisors, whose sum is σ = 51105620. Its totient is φ = 51105618.

The previous prime is 51105599. The next prime is 51105641. The reversal of 51105619 is 91650115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51105619 - 2⁹ = 51105107 is a prime.

It is a super-2 number, since 2×51105619² = 5223568586746322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51105319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25552809 + 25552810.

It is an arithmetic number, because the mean of its divisors is an integer number (25552810).

Almost surely, 2^51105619 is an apocalyptic number.

51105619 is a deficient number, since it is larger than the sum of its proper divisors (1).

51105619 is an equidigital number, since it uses as much as digits as its factorization.

51105619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 51105619 is about 7148.8194130220. The cubic root of 51105619 is about 371.0988008282.

The spelling of 51105619 in words is "fifty-one million, one hundred five thousand, six hundred nineteen".