210340105 has 4 divisors (see below), whose sum is σ = 252408132. Its totient is φ = 168272080.

The previous prime is 210340063. The next prime is 210340159. The reversal of 210340105 is 501043012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37785609 + 172554496 = 6147^2 + 13136^2 .

It is not a de Polignac number, because 210340105 - 2¹⁵ = 210307337 is a prime.

It is a super-2 number, since 2×210340105² = 88485919542822050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21034006 + ... + 21034015.

It is an arithmetic number, because the mean of its divisors is an integer number (63102033).

Almost surely, 2^210340105 is an apocalyptic number.

It is an amenable number.

210340105 is a deficient number, since it is larger than the sum of its proper divisors (42068027).

210340105 is an equidigital number, since it uses as much as digits as its factorization.

210340105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42068026.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 210340105 is about 14503.1067361445. The cubic root of 210340105 is about 594.7129043589.

Adding to 210340105 its reverse (501043012), we get a palindrome (711383117).

The spelling of 210340105 in words is "two hundred ten million, three hundred forty thousand, one hundred five".