42545550 has 24 divisors (see below), whose sum is σ = 105513336. Its totient is φ = 11345440.

The previous prime is 42545539. The next prime is 42545557. The reversal of 42545550 is 5554524.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42545557) 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 11 ways as a sum of consecutive naturals, for example, 141669 + ... + 141968.

It is an arithmetic number, because the mean of its divisors is an integer number (4396389).

Almost surely, 2^42545550 is an apocalyptic number.

42545550 is an abundant number, since it is smaller than the sum of its proper divisors (62967786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42545550 is a wasteful number, since it uses less digits than its factorization.

42545550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283652 (or 283647 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 42545550 is about 6522.6949951688. The cubic root of 42545550 is about 349.1012314335.

The spelling of 42545550 in words is "forty-two million, five hundred forty-five thousand, five hundred fifty".