22144877 has 4 divisors (see below), whose sum is σ = 22160220. Its totient is φ = 22129536.

The previous prime is 22144873. The next prime is 22144921. The reversal of 22144877 is 77844122.

It is a happy number.

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 10982596 + 11162281 = 3314^2 + 3341^2 .

It is a cyclic number.

It is not a de Polignac number, because 22144877 - 2² = 22144873 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 (22144873) 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, 5252 + ... + 8477.

It is an arithmetic number, because the mean of its divisors is an integer number (5540055).

Almost surely, 2^22144877 is an apocalyptic number.

It is an amenable number.

22144877 is a deficient number, since it is larger than the sum of its proper divisors (15343).

22144877 is a wasteful number, since it uses less digits than its factorization.

22144877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15342.

The product of its digits is 25088, while the sum is 35.

The square root of 22144877 is about 4705.8343574758. The cubic root of 22144877 is about 280.8176651752.

Adding to 22144877 its reverse (77844122), we get a palindrome (99988999).

The spelling of 22144877 in words is "twenty-two million, one hundred forty-four thousand, eight hundred seventy-seven".