210130817 has 16 divisors (see below), whose sum is σ = 229149648. Its totient is φ = 191539200.

The previous prime is 210130813. The next prime is 210130903. The reversal of 210130817 is 718031012.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 10784656 + 199346161 = 3284^2 + 14119^2 .

It is a cyclic number.

It is not a de Polignac number, because 210130817 - 2² = 210130813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210130792 and 210130801.

It is not an unprimeable number, because it can be changed into a prime (210130813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 523817 + ... + 524217.

It is an arithmetic number, because the mean of its divisors is an integer number (14321853).

Almost surely, 2^210130817 is an apocalyptic number.

It is an amenable number.

210130817 is a deficient number, since it is larger than the sum of its proper divisors (19018831).

210130817 is a wasteful number, since it uses less digits than its factorization.

210130817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 210130817 is about 14495.8896587964. The cubic root of 210130817 is about 594.5155928375.

Adding to 210130817 its reverse (718031012), we get a palindrome (928161829).

The spelling of 210130817 in words is "two hundred ten million, one hundred thirty thousand, eight hundred seventeen".