42210523 has 2 divisors, whose sum is σ = 42210524. Its totient is φ = 42210522.

The previous prime is 42210521. The next prime is 42210529. The reversal of 42210523 is 32501224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42210523 - 2¹ = 42210521 is a prime.

Together with 42210521, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 42210523.

It is not a weakly prime, because it can be changed into another prime (42210521) 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 as a sum of consecutive naturals, namely, 21105261 + 21105262.

It is an arithmetic number, because the mean of its divisors is an integer number (21105262).

Almost surely, 2^42210523 is an apocalyptic number.

42210523 is a deficient number, since it is larger than the sum of its proper divisors (1).

42210523 is an equidigital number, since it uses as much as digits as its factorization.

42210523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 42210523 is about 6496.9625980146. The cubic root of 42210523 is about 348.1824774046.

Adding to 42210523 its reverse (32501224), we get a palindrome (74711747).

The spelling of 42210523 in words is "forty-two million, two hundred ten thousand, five hundred twenty-three".