20226215 has 8 divisors (see below), whose sum is σ = 24788160. Its totient is φ = 15836512.

The previous prime is 20226191. The next prime is 20226221. The reversal of 20226215 is 51262202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20226215 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 42800 + ... + 43269.

It is an arithmetic number, because the mean of its divisors is an integer number (3098520).

Almost surely, 2^20226215 is an apocalyptic number.

20226215 is a deficient number, since it is larger than the sum of its proper divisors (4561945).

20226215 is an equidigital number, since it uses as much as digits as its factorization.

20226215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86121.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20226215 is about 4497.3564457357. The cubic root of 20226215 is about 272.4613305395.

Adding to 20226215 its reverse (51262202), we get a palindrome (71488417).

The spelling of 20226215 in words is "twenty million, two hundred twenty-six thousand, two hundred fifteen".