51105542219 has 2 divisors, whose sum is σ = 51105542220. Its totient is φ = 51105542218.

The previous prime is 51105542209. The next prime is 51105542221. The reversal of 51105542219 is 91224550115.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51105542219 is a prime.

It is a super-2 number, since 2×51105542219² (a number of 22 digits) contains 22 as substring.

Together with 51105542221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51105542209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25552771109 + 25552771110.

It is an arithmetic number, because the mean of its divisors is an integer number (25552771110).

Almost surely, 2^51105542219 is an apocalyptic number.

51105542219 is a deficient number, since it is larger than the sum of its proper divisors (1).

51105542219 is an equidigital number, since it uses as much as digits as its factorization.

51105542219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 35.

The spelling of 51105542219 in words is "fifty-one billion, one hundred five million, five hundred forty-two thousand, two hundred nineteen".