51105222187 has 2 divisors, whose sum is σ = 51105222188. Its totient is φ = 51105222186.

The previous prime is 51105222173. The next prime is 51105222211. The reversal of 51105222187 is 78122250115.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51105222187 is a prime.

It is a super-2 number, since 2×51105222187² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51105222167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25552611093 + 25552611094.

It is an arithmetic number, because the mean of its divisors is an integer number (25552611094).

Almost surely, 2^51105222187 is an apocalyptic number.

51105222187 is a deficient number, since it is larger than the sum of its proper divisors (1).

51105222187 is an equidigital number, since it uses as much as digits as its factorization.

51105222187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11200, while the sum is 34.

The spelling of 51105222187 in words is "fifty-one billion, one hundred five million, two hundred twenty-two thousand, one hundred eighty-seven".