42550618 has 12 divisors (see below), whose sum is σ = 70156170. Its totient is φ = 19341080.

The previous prime is 42550603. The next prime is 42550637. The reversal of 42550618 is 81605524.

It can be written as a sum of positive squares in only one way, i.e., 42549529 + 1089 = 6523^2 + 33^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42550618.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 87673 + ... + 88156.

Almost surely, 2^42550618 is an apocalyptic number.

42550618 is a deficient number, since it is larger than the sum of its proper divisors (27605552).

42550618 is a wasteful number, since it uses less digits than its factorization.

42550618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175853 (or 175842 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 42550618 is about 6523.0834733276. The cubic root of 42550618 is about 349.1150924585.

It can be divided in two parts, 425506 and 18, that added together give a palindrome (425524).

The spelling of 42550618 in words is "forty-two million, five hundred fifty thousand, six hundred eighteen".