215422 has 8 divisors (see below), whose sum is σ = 340200. Its totient is φ = 102024.

The previous prime is 215417. The next prime is 215443. The reversal of 215422 is 224512.

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

It is a junction number, because it is equal to n+sod(n) for n = 215396 and 215405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2797 + ... + 2872.

It is an arithmetic number, because the mean of its divisors is an integer number (42525).

2²¹⁵⁴²² is an apocalyptic number.

215422 is a deficient number, since it is larger than the sum of its proper divisors (124778).

215422 is a wasteful number, since it uses less digits than its factorization.

215422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5690.

The product of its digits is 160, while the sum is 16.

The square root of 215422 is about 464.1357560025. The cubic root of 215422 is about 59.9464336732.

Adding to 215422 its reverse (224512), we get a palindrome (439934).

The spelling of 215422 in words is "two hundred fifteen thousand, four hundred twenty-two".