210085819 has 2 divisors, whose sum is σ = 210085820. Its totient is φ = 210085818.

The previous prime is 210085807. The next prime is 210085829. The reversal of 210085819 is 918580012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210085819 - 2⁷ = 210085691 is a prime.

It is a super-2 number, since 2×210085819² = 88272102689801522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210085829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105042909 + 105042910.

It is an arithmetic number, because the mean of its divisors is an integer number (105042910).

Almost surely, 2^210085819 is an apocalyptic number.

210085819 is a deficient number, since it is larger than the sum of its proper divisors (1).

210085819 is an equidigital number, since it uses as much as digits as its factorization.

210085819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 210085819 is about 14494.3374805474. The cubic root of 210085819 is about 594.4731527315.

The spelling of 210085819 in words is "two hundred ten million, eighty-five thousand, eight hundred nineteen".