215221611422 has 8 divisors (see below), whose sum is σ = 330340147896. Its totient is φ = 105108228792.

The previous prime is 215221611421. The next prime is 215221611461. The reversal of 215221611422 is 224116122512.

215221611422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215221611421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1251288353 + ... + 1251288524.

It is an arithmetic number, because the mean of its divisors is an integer number (41292518487).

Almost surely, 2^215221611422 is an apocalyptic number.

215221611422 is a deficient number, since it is larger than the sum of its proper divisors (115118536474).

215221611422 is a wasteful number, since it uses less digits than its factorization.

215221611422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502576922.

The product of its digits is 3840, while the sum is 29.

Adding to 215221611422 its reverse (224116122512), we get a palindrome (439337733934).

The spelling of 215221611422 in words is "two hundred fifteen billion, two hundred twenty-one million, six hundred eleven thousand, four hundred twenty-two".