216834125 has 8 divisors (see below), whose sum is σ = 270609144. Its totient is φ = 173467200.

The previous prime is 216834089. The next prime is 216834127. The reversal of 216834125 is 521438612.

It can be written as a sum of positive squares in 4 ways, for example, as 244036 + 216590089 = 494^2 + 14717^2 .

It is not a de Polignac number, because 216834125 - 2¹⁸ = 216571981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 216834091 and 216834100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216834127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 867212 + ... + 867461.

It is an arithmetic number, because the mean of its divisors is an integer number (33826143).

Almost surely, 2^216834125 is an apocalyptic number.

216834125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216834125 is a deficient number, since it is larger than the sum of its proper divisors (53775019).

216834125 is an equidigital number, since it uses as much as digits as its factorization.

216834125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734688 (or 1734678 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 216834125 is about 14725.2886219592. The cubic root of 216834125 is about 600.7713459138.

The spelling of 216834125 in words is "two hundred sixteen million, eight hundred thirty-four thousand, one hundred twenty-five".