84210875851 has 2 divisors, whose sum is σ = 84210875852. Its totient is φ = 84210875850.

The previous prime is 84210875849. The next prime is 84210875893. The reversal of 84210875851 is 15857801248.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84210875851 - 2¹ = 84210875849 is a prime.

It is a super-2 number, since 2×84210875851² (a number of 23 digits) contains 22 as substring.

Together with 84210875849, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 84210875795 and 84210875804.

It is not a weakly prime, because it can be changed into another prime (84210875831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42105437925 + 42105437926.

It is an arithmetic number, because the mean of its divisors is an integer number (42105437926).

Almost surely, 2^84210875851 is an apocalyptic number.

84210875851 is a deficient number, since it is larger than the sum of its proper divisors (1).

84210875851 is an equidigital number, since it uses as much as digits as its factorization.

84210875851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 716800, while the sum is 49.

The spelling of 84210875851 in words is "eighty-four billion, two hundred ten million, eight hundred seventy-five thousand, eight hundred fifty-one".