22146557 has 4 divisors (see below), whose sum is σ = 22261500. Its totient is φ = 22031616.

The previous prime is 22146547. The next prime is 22146559. The reversal of 22146557 is 75564122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75564122 = 2 ⋅37782061.

It can be written as a sum of positive squares in 2 ways, for example, as 5410276 + 16736281 = 2326^2 + 4091^2 .

It is a cyclic number.

It is not a de Polignac number, because 22146557 - 2¹⁰ = 22145533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22146559) 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 3 ways as a sum of consecutive naturals, for example, 57182 + ... + 57567.

It is an arithmetic number, because the mean of its divisors is an integer number (5565375).

Almost surely, 2^22146557 is an apocalyptic number.

It is an amenable number.

22146557 is a deficient number, since it is larger than the sum of its proper divisors (114943).

22146557 is a wasteful number, since it uses less digits than its factorization.

22146557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114942.

The product of its digits is 16800, while the sum is 32.

The square root of 22146557 is about 4706.0128559110. The cubic root of 22146557 is about 280.8247663172.

The spelling of 22146557 in words is "twenty-two million, one hundred forty-six thousand, five hundred fifty-seven".