213808105 has 16 divisors (see below), whose sum is σ = 294925824. Its totient is φ = 145759680.

The previous prime is 213808103. The next prime is 213808141. The reversal of 213808105 is 501808312.

It is not a de Polignac number, because 213808105 - 2¹ = 213808103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213808103) 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, 11601 + ... + 23710.

It is an arithmetic number, because the mean of its divisors is an integer number (18432864).

Almost surely, 2^213808105 is an apocalyptic number.

It is an amenable number.

213808105 is a deficient number, since it is larger than the sum of its proper divisors (81117719).

213808105 is a wasteful number, since it uses less digits than its factorization.

213808105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35496.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 213808105 is about 14622.1785312586. The cubic root of 213808105 is about 597.9635636237.

The spelling of 213808105 in words is "two hundred thirteen million, eight hundred eight thousand, one hundred five".