42016823 has 4 divisors (see below), whose sum is σ = 42141840. Its totient is φ = 41891808.

The previous prime is 42016813. The next prime is 42016831. The reversal of 42016823 is 32861024.

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 42016823 - 2⁸ = 42016567 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42016792 and 42016801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42016813) 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, 62003 + ... + 62676.

It is an arithmetic number, because the mean of its divisors is an integer number (10535460).

Almost surely, 2^42016823 is an apocalyptic number.

42016823 is a deficient number, since it is larger than the sum of its proper divisors (125017).

42016823 is a wasteful number, since it uses less digits than its factorization.

42016823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125016.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 42016823 is about 6482.0384910921. The cubic root of 42016823 is about 347.6490687667.

Adding to 42016823 its reverse (32861024), we get a palindrome (74877847).

The spelling of 42016823 in words is "forty-two million, sixteen thousand, eight hundred twenty-three".