213442406 has 8 divisors (see below), whose sum is σ = 320907744. Its totient is φ = 106473160.

The previous prime is 213442399. The next prime is 213442417. The reversal of 213442406 is 604244312.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 122945 + ... + 124668.

It is an arithmetic number, because the mean of its divisors is an integer number (40113468).

Almost surely, 2^213442406 is an apocalyptic number.

213442406 is a deficient number, since it is larger than the sum of its proper divisors (107465338).

213442406 is a wasteful number, since it uses less digits than its factorization.

213442406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248046.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 213442406 is about 14609.6682371640. The cubic root of 213442406 is about 597.6224486005.

Adding to 213442406 its reverse (604244312), we get a palindrome (817686718).

The spelling of 213442406 in words is "two hundred thirteen million, four hundred forty-two thousand, four hundred six".