22111457 has 4 divisors (see below), whose sum is σ = 22138116. Its totient is φ = 22084800.

The previous prime is 22111447. The next prime is 22111471. The reversal of 22111457 is 75411122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75411122 = 2 ⋅37705561.

It can be written as a sum of positive squares in 2 ways, for example, as 16654561 + 5456896 = 4081^2 + 2336^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111457 - 2⁶ = 22111393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22111447) 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, 12044 + ... + 13757.

It is an arithmetic number, because the mean of its divisors is an integer number (5534529).

Almost surely, 2^22111457 is an apocalyptic number.

It is an amenable number.

22111457 is a deficient number, since it is larger than the sum of its proper divisors (26659).

22111457 is an equidigital number, since it uses as much as digits as its factorization.

22111457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26658.

The product of its digits is 560, while the sum is 23.

The square root of 22111457 is about 4702.2821055313. The cubic root of 22111457 is about 280.6763284764.

Adding to 22111457 its reverse (75411122), we get a palindrome (97522579).

The spelling of 22111457 in words is "twenty-two million, one hundred eleven thousand, four hundred fifty-seven".