42550109 has 4 divisors (see below), whose sum is σ = 48628704. Its totient is φ = 36471516.

The previous prime is 42550061. The next prime is 42550121. The reversal of 42550109 is 90105524.

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 42550109 - 2⁸ = 42549853 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 (42550129) 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, 3039287 + ... + 3039300.

It is an arithmetic number, because the mean of its divisors is an integer number (12157176).

Almost surely, 2^42550109 is an apocalyptic number.

It is an amenable number.

42550109 is a deficient number, since it is larger than the sum of its proper divisors (6078595).

42550109 is an equidigital number, since it uses as much as digits as its factorization.

42550109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6078594.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 42550109 is about 6523.0444579199. The cubic root of 42550109 is about 349.1137003887.

The spelling of 42550109 in words is "forty-two million, five hundred fifty thousand, one hundred nine".