213840105 has 8 divisors (see below), whose sum is σ = 342144192. Its totient is φ = 114048048.

The previous prime is 213840103. The next prime is 213840163. The reversal of 213840105 is 501048312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213840105 - 2¹ = 213840103 is a prime.

It is a super-2 number, since 2×213840105² = 91455181012822050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213840103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7127989 + ... + 7128018.

It is an arithmetic number, because the mean of its divisors is an integer number (42768024).

Almost surely, 2^213840105 is an apocalyptic number.

It is an amenable number.

213840105 is a deficient number, since it is larger than the sum of its proper divisors (128304087).

213840105 is a wasteful number, since it uses less digits than its factorization.

213840105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14256015.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 213840105 is about 14623.2727185128. The cubic root of 213840105 is about 597.9933939234.

Adding to 213840105 its reverse (501048312), we get a palindrome (714888417).

The spelling of 213840105 in words is "two hundred thirteen million, eight hundred forty thousand, one hundred five".