42224023 has 4 divisors (see below), whose sum is σ = 44446360. Its totient is φ = 40001688.

The previous prime is 42223997. The next prime is 42224033. The reversal of 42224023 is 32042224.

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

It is not a de Polignac number, because 42224023 - 2²¹ = 40126871 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 2222317 = 42224023 / (4 + 2 + 2 + 2 + 4 + 0 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42224033) 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 3 ways as a sum of consecutive naturals, for example, 1111140 + ... + 1111177.

It is an arithmetic number, because the mean of its divisors is an integer number (11111590).

Almost surely, 2^42224023 is an apocalyptic number.

42224023 is a deficient number, since it is larger than the sum of its proper divisors (2222337).

42224023 is a wasteful number, since it uses less digits than its factorization.

42224023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222336.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 42224023 is about 6498.0014619881. The cubic root of 42224023 is about 348.2195926552.

Subtracting from 42224023 its sum of digits (19), we obtain a square (42224004 = 6498²).

Adding to 42224023 its reverse (32042224), we get a palindrome (74266247).

The spelling of 42224023 in words is "forty-two million, two hundred twenty-four thousand, twenty-three".