221432213415406 has 8 divisors (see below), whose sum is σ = 379598080140720. Its totient is φ = 94899520035168.

The previous prime is 221432213415379. The next prime is 221432213415443. The reversal of 221432213415406 is 604514312234122.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7908293336251 + ... + 7908293336278.

It is an arithmetic number, because the mean of its divisors is an integer number (47449760017590).

Almost surely, 2^{221432213415406} is an apocalyptic number.

221432213415406 is a deficient number, since it is larger than the sum of its proper divisors (158165866725314).

221432213415406 is a wasteful number, since it uses less digits than its factorization.

221432213415406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15816586672538.

The product of its (nonzero) digits is 276480, while the sum is 40.

Adding to 221432213415406 its reverse (604514312234122), we get a palindrome (825946525649528).

The spelling of 221432213415406 in words is "two hundred twenty-one trillion, four hundred thirty-two billion, two hundred thirteen million, four hundred fifteen thousand, four hundred six".