22216557 has 16 divisors (see below), whose sum is σ = 32394240. Its totient is φ = 13431600.

The previous prime is 22216549. The next prime is 22216561. The reversal of 22216557 is 75561222.

It is not a de Polignac number, because 22216557 - 2³ = 22216549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22216507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23932 + ... + 24842.

It is an arithmetic number, because the mean of its divisors is an integer number (2024640).

Almost surely, 2^22216557 is an apocalyptic number.

It is an amenable number.

22216557 is a deficient number, since it is larger than the sum of its proper divisors (10177683).

22216557 is a wasteful number, since it uses less digits than its factorization.

22216557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664.

The product of its digits is 8400, while the sum is 30.

The square root of 22216557 is about 4713.4442820511. Note that the first 3 decimals coincide. The cubic root of 22216557 is about 281.1203285693.

Adding to 22216557 its reverse (75561222), we get a palindrome (97777779).

It can be divided in two parts, 222165 and 57, that added together give a palindrome (222222).

The spelling of 22216557 in words is "twenty-two million, two hundred sixteen thousand, five hundred fifty-seven".