22143513 has 16 divisors (see below), whose sum is σ = 33816960. Its totient is φ = 12625536.

The previous prime is 22143509. The next prime is 22143547. The reversal of 22143513 is 31534122.

It is not a de Polignac number, because 22143513 - 2² = 22143509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 22143513.

It is not an unprimeable number, because it can be changed into a prime (22143013) 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 15 ways as a sum of consecutive naturals, for example, 12103 + ... + 13811.

It is an arithmetic number, because the mean of its divisors is an integer number (2113560).

Almost surely, 2^22143513 is an apocalyptic number.

It is an amenable number.

22143513 is a deficient number, since it is larger than the sum of its proper divisors (11673447).

22143513 is a wasteful number, since it uses less digits than its factorization.

22143513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336.

The product of its digits is 720, while the sum is 21.

The square root of 22143513 is about 4705.6894287660. The cubic root of 22143513 is about 280.8118994600.

Adding to 22143513 its reverse (31534122), we get a palindrome (53677635).

It can be divided in two parts, 221 and 43513, that added together give a palindrome (43734).

The spelling of 22143513 in words is "twenty-two million, one hundred forty-three thousand, five hundred thirteen".