22218351 has 16 divisors (see below), whose sum is σ = 31331328. Its totient is φ = 13982400.

The previous prime is 22218349. The next prime is 22218373. The reversal of 22218351 is 15381222.

It is not a de Polignac number, because 22218351 - 2¹ = 22218349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22218311) 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 15 ways as a sum of consecutive naturals, for example, 900 + ... + 6726.

It is an arithmetic number, because the mean of its divisors is an integer number (1958208).

Almost surely, 2^22218351 is an apocalyptic number.

22218351 is a deficient number, since it is larger than the sum of its proper divisors (9112977).

22218351 is a wasteful number, since it uses less digits than its factorization.

22218351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5902.

The product of its digits is 960, while the sum is 24.

The square root of 22218351 is about 4713.6345849037. The cubic root of 22218351 is about 281.1278952428.

Adding to 22218351 its reverse (15381222), we get a palindrome (37599573).

The spelling of 22218351 in words is "twenty-two million, two hundred eighteen thousand, three hundred fifty-one".