22111057 has 4 divisors (see below), whose sum is σ = 22140580. Its totient is φ = 22081536.

The previous prime is 22111051. The next prime is 22111069. The reversal of 22111057 is 75011122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75011122 = 2 ⋅37505561.

It can be written as a sum of positive squares in 2 ways, for example, as 15397776 + 6713281 = 3924^2 + 2591^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111057 - 2¹⁵ = 22078289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22111051) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13608 + ... + 15145.

It is an arithmetic number, because the mean of its divisors is an integer number (5535145).

Almost surely, 2^22111057 is an apocalyptic number.

It is an amenable number.

22111057 is a deficient number, since it is larger than the sum of its proper divisors (29523).

22111057 is an equidigital number, since it uses as much as digits as its factorization.

22111057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29522.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 22111057 is about 4702.2395727993. The cubic root of 22111057 is about 280.6746359721.

Adding to 22111057 its reverse (75011122), we get a palindrome (97122179).

The spelling of 22111057 in words is "twenty-two million, one hundred eleven thousand, fifty-seven".