42550423 has 4 divisors (see below), whose sum is σ = 42585480. Its totient is φ = 42515368.

The previous prime is 42550421. The next prime is 42550447. The reversal of 42550423 is 32405524.

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 42550423 - 2¹ = 42550421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42550421) 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, 15640 + ... + 18157.

It is an arithmetic number, because the mean of its divisors is an integer number (10646370).

Almost surely, 2^42550423 is an apocalyptic number.

42550423 is a deficient number, since it is larger than the sum of its proper divisors (35057).

42550423 is a wasteful number, since it uses less digits than its factorization.

42550423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35056.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 42550423 is about 6523.0685263915. The cubic root of 42550423 is about 349.1145591522.

Adding to 42550423 its reverse (32405524), we get a palindrome (74955947).

The spelling of 42550423 in words is "forty-two million, five hundred fifty thousand, four hundred twenty-three".