42550055 has 4 divisors (see below), whose sum is σ = 51060072. Its totient is φ = 34040040.

The previous prime is 42550051. The next prime is 42550061. The reversal of 42550055 is 55005524.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42550055 - 2² = 42550051 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 (42550051) 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, 4255001 + ... + 4255010.

It is an arithmetic number, because the mean of its divisors is an integer number (12765018).

Almost surely, 2^42550055 is an apocalyptic number.

42550055 is a deficient number, since it is larger than the sum of its proper divisors (8510017).

42550055 is an equidigital number, since it uses as much as digits as its factorization.

42550055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8510016.

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 42550055 is about 6523.0403187471. The cubic root of 42550055 is about 349.1135527029.

Adding to 42550055 its reverse (55005524), we get a palindrome (97555579).

The spelling of 42550055 in words is "forty-two million, five hundred fifty thousand, fifty-five".