22315143 has 4 divisors (see below), whose sum is σ = 29753528. Its totient is φ = 14876760.

The previous prime is 22315121. The next prime is 22315147. The reversal of 22315143 is 34151322.

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

It is not a de Polignac number, because 22315143 - 2⁶ = 22315079 is a prime.

It is a super-3 number, since 3×22315143³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22315147) 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, 3719188 + ... + 3719193.

It is an arithmetic number, because the mean of its divisors is an integer number (7438382).

Almost surely, 2^22315143 is an apocalyptic number.

22315143 is a deficient number, since it is larger than the sum of its proper divisors (7438385).

22315143 is an equidigital number, since it uses as much as digits as its factorization.

22315143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7438384.

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

The square root of 22315143 is about 4723.8906634256. The cubic root of 22315143 is about 281.5355389469.

Adding to 22315143 its reverse (34151322), we get a palindrome (56466465).

The spelling of 22315143 in words is "twenty-two million, three hundred fifteen thousand, one hundred forty-three".