215422222 has 4 divisors (see below), whose sum is σ = 323133336. Its totient is φ = 107711110.

The previous prime is 215422201. The next prime is 215422223. The reversal of 215422222 is 222224512.

215422222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

215422222 is a modest number, since divided by 22222 gives 2154 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 215422193 and 215422202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215422223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53855554 + ... + 53855557.

It is an arithmetic number, because the mean of its divisors is an integer number (80783334).

Almost surely, 2^215422222 is an apocalyptic number.

215422222 is a deficient number, since it is larger than the sum of its proper divisors (107711114).

215422222 is a wasteful number, since it uses less digits than its factorization.

215422222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107711113.

The product of its digits is 1280, while the sum is 22.

The square root of 215422222 is about 14677.2688876371. The cubic root of 215422222 is about 599.4645426549.

Adding to 215422222 its reverse (222224512), we get a palindrome (437646734).

The spelling of 215422222 in words is "two hundred fifteen million, four hundred twenty-two thousand, two hundred twenty-two".