22144513 has 4 divisors (see below), whose sum is σ = 22562388. Its totient is φ = 21726640.

The previous prime is 22144511. The next prime is 22144541. The reversal of 22144513 is 31544122.

22144513 = 3327² + 3328².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31544122 = 2 ⋅15772061.

It can be written as a sum of positive squares in 2 ways, for example, as 11068929 + 11075584 = 3327^2 + 3328^2 .

It is a cyclic number.

It is not a de Polignac number, because 22144513 - 2¹ = 22144511 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (22144511) 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, 208858 + ... + 208963.

It is an arithmetic number, because the mean of its divisors is an integer number (5640597).

Almost surely, 2^22144513 is an apocalyptic number.

22144513 is the 3328-th centered square number.

It is an amenable number.

22144513 is a deficient number, since it is larger than the sum of its proper divisors (417875).

22144513 is an equidigital number, since it uses as much as digits as its factorization.

22144513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417874.

The product of its digits is 960, while the sum is 22.

The square root of 22144513 is about 4705.7956819225. The cubic root of 22144513 is about 280.8161265471.

Adding to 22144513 its reverse (31544122), we get a palindrome (53688635).

The spelling of 22144513 in words is "twenty-two million, one hundred forty-four thousand, five hundred thirteen".