22540143 has 8 divisors (see below), whose sum is σ = 30076288. Its totient is φ = 15015384.

The previous prime is 22540121. The next prime is 22540153. The reversal of 22540143 is 34104522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22540143 - 2⁹ = 22539631 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 (22540153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4446 + ... + 8052.

It is an arithmetic number, because the mean of its divisors is an integer number (3759536).

Almost surely, 2^22540143 is an apocalyptic number.

22540143 is a deficient number, since it is larger than the sum of its proper divisors (7536145).

22540143 is a wasteful number, since it uses less digits than its factorization.

22540143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5693.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 22540143 is about 4747.6460483065. The cubic root of 22540143 is about 282.4786022898.

Adding to 22540143 its reverse (34104522), we get a palindrome (56644665).

The spelling of 22540143 in words is "twenty-two million, five hundred forty thousand, one hundred forty-three".