22124477 has 4 divisors (see below), whose sum is σ = 22887420. Its totient is φ = 21361536.

The previous prime is 22124467. The next prime is 22124507. The reversal of 22124477 is 77442122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18567481 + 3556996 = 4309^2 + 1886^2 .

It is a cyclic number.

It is not a de Polignac number, because 22124477 - 2¹² = 22120381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 762913 = 22124477 / (2 + 2 + 1 + 2 + 4 + 4 + 7 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22124437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381428 + ... + 381485.

It is an arithmetic number, because the mean of its divisors is an integer number (5721855).

Almost surely, 2^22124477 is an apocalyptic number.

It is an amenable number.

22124477 is a deficient number, since it is larger than the sum of its proper divisors (762943).

22124477 is an equidigital number, since it uses as much as digits as its factorization.

22124477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762942.

The product of its digits is 6272, while the sum is 29.

The square root of 22124477 is about 4703.6663359554. Note that the first 3 decimals coincide. The cubic root of 22124477 is about 280.7314083497.

Adding to 22124477 its reverse (77442122), we get a palindrome (99566599).

The spelling of 22124477 in words is "twenty-two million, one hundred twenty-four thousand, four hundred seventy-seven".