22878143 has 4 divisors (see below), whose sum is σ = 23364960. Its totient is φ = 22391328.

The previous prime is 22878133. The next prime is 22878151. The reversal of 22878143 is 34187822.

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

It is a cyclic number.

It is not a de Polignac number, because 22878143 - 2¹⁰ = 22877119 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 (22878133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243338 + ... + 243431.

It is an arithmetic number, because the mean of its divisors is an integer number (5841240).

Almost surely, 2^22878143 is an apocalyptic number.

22878143 is a deficient number, since it is larger than the sum of its proper divisors (486817).

22878143 is an equidigital number, since it uses as much as digits as its factorization.

22878143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486816.

The product of its digits is 21504, while the sum is 35.

The square root of 22878143 is about 4783.1101806252. The cubic root of 22878143 is about 283.8835691155.

The spelling of 22878143 in words is "twenty-two million, eight hundred seventy-eight thousand, one hundred forty-three".