213646434 has 16 divisors (see below), whose sum is σ = 434535840. Its totient is φ = 70008320.

The previous prime is 213646421. The next prime is 213646439. The reversal of 213646434 is 434646312.

It is a junction number, because it is equal to n+sod(n) for n = 213646395 and 213646404.

It is not an unprimeable number, because it can be changed into a prime (213646439) 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, 301407 + ... + 302114.

It is an arithmetic number, because the mean of its divisors is an integer number (27158490).

Almost surely, 2^213646434 is an apocalyptic number.

213646434 is an abundant number, since it is smaller than the sum of its proper divisors (220889406).

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

213646434 is a wasteful number, since it uses less digits than its factorization.

213646434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603585.

The product of its digits is 41472, while the sum is 33.

The square root of 213646434 is about 14616.6492056148. The cubic root of 213646434 is about 597.8128089021.

The spelling of 213646434 in words is "two hundred thirteen million, six hundred forty-six thousand, four hundred thirty-four".