22420215 has 12 divisors (see below), whose sum is σ = 38861784. Its totient is φ = 11957424.

The previous prime is 22420213. The next prime is 22420241. The reversal of 22420215 is 51202422.

It is not a de Polignac number, because 22420215 - 2¹ = 22420213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22420213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 249069 + ... + 249158.

It is an arithmetic number, because the mean of its divisors is an integer number (3238482).

Almost surely, 2^22420215 is an apocalyptic number.

22420215 is a deficient number, since it is larger than the sum of its proper divisors (16441569).

22420215 is a wasteful number, since it uses less digits than its factorization.

22420215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498238 (or 498235 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22420215 is about 4734.9989440337. The cubic root of 22420215 is about 281.9767220864.

Adding to 22420215 its reverse (51202422), we get a palindrome (73622637).

The spelling of 22420215 in words is "twenty-two million, four hundred twenty thousand, two hundred fifteen".