42023813 has 32 divisors (see below), whose sum is σ = 50803200. Its totient is φ = 34384896.

The previous prime is 42023809. The next prime is 42023819. The reversal of 42023813 is 31832024.

It is not a de Polignac number, because 42023813 - 2² = 42023809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42023819) 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 31 ways as a sum of consecutive naturals, for example, 506270 + ... + 506352.

It is an arithmetic number, because the mean of its divisors is an integer number (1587600).

Almost surely, 2^42023813 is an apocalyptic number.

It is an amenable number.

42023813 is a deficient number, since it is larger than the sum of its proper divisors (8779387).

42023813 is a wasteful number, since it uses less digits than its factorization.

42023813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 42023813 is about 6482.5776509040. The cubic root of 42023813 is about 347.6683462217.

Adding to 42023813 its reverse (31832024), we get a palindrome (73855837).

The spelling of 42023813 in words is "forty-two million, twenty-three thousand, eight hundred thirteen".