42536813 has 4 divisors (see below), whose sum is σ = 46403808. Its totient is φ = 38669820.

The previous prime is 42536807. The next prime is 42536827. The reversal of 42536813 is 31863524.

42536813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42536813 - 2⁴ = 42536797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42536813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42536843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1933481 + ... + 1933502.

It is an arithmetic number, because the mean of its divisors is an integer number (11600952).

Almost surely, 2^42536813 is an apocalyptic number.

It is an amenable number.

42536813 is a deficient number, since it is larger than the sum of its proper divisors (3866995).

42536813 is a wasteful number, since it uses less digits than its factorization.

42536813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3866994.

The product of its digits is 17280, while the sum is 32.

The square root of 42536813 is about 6522.0252222757. The cubic root of 42536813 is about 349.0773330762.

Subtracting from 42536813 its reverse (31863524), we obtain a square (10673289 = 3267²).

The spelling of 42536813 in words is "forty-two million, five hundred thirty-six thousand, eight hundred thirteen".