213505206 has 16 divisors (see below), whose sum is σ = 428361264. Its totient is φ = 70943264.

The previous prime is 213505177. The next prime is 213505219. The reversal of 213505206 is 602505312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54225 + ... + 58028.

It is an arithmetic number, because the mean of its divisors is an integer number (26772579).

Almost surely, 2^213505206 is an apocalyptic number.

213505206 is an abundant number, since it is smaller than the sum of its proper divisors (214856058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213505206 is a wasteful number, since it uses less digits than its factorization.

213505206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112575.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 213505206 is about 14611.8173407691. The cubic root of 213505206 is about 597.6810545890.

The spelling of 213505206 in words is "two hundred thirteen million, five hundred five thousand, two hundred six".