215212226 has 8 divisors (see below), whose sum is σ = 323132160. Its totient is φ = 107501508.

The previous prime is 215212223. The next prime is 215212267. The reversal of 215212226 is 622212512.

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

It is not an unprimeable number, because it can be changed into a prime (215212223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49706 + ... + 53861.

It is an arithmetic number, because the mean of its divisors is an integer number (40391520).

Almost surely, 2^215212226 is an apocalyptic number.

215212226 is a deficient number, since it is larger than the sum of its proper divisors (107919934).

215212226 is a wasteful number, since it uses less digits than its factorization.

215212226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104608.

The product of its digits is 960, while the sum is 23.

The square root of 215212226 is about 14670.1133601619. The cubic root of 215212226 is about 599.2696910717.

Adding to 215212226 its reverse (622212512), we get a palindrome (837424738).

The spelling of 215212226 in words is "two hundred fifteen million, two hundred twelve thousand, two hundred twenty-six".