42355218 has 32 divisors (see below), whose sum is σ = 90316800. Its totient is φ = 13203216.

The previous prime is 42355193. The next prime is 42355219. The reversal of 42355218 is 81255324.

It is not an unprimeable number, because it can be changed into a prime (42355219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6655 + ... + 11357.

It is an arithmetic number, because the mean of its divisors is an integer number (2822400).

Almost surely, 2^42355218 is an apocalyptic number.

42355218 is an abundant number, since it is smaller than the sum of its proper divisors (47961582).

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

42355218 is a wasteful number, since it uses less digits than its factorization.

42355218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806.

The product of its digits is 9600, while the sum is 30.

The square root of 42355218 is about 6508.0886595067. The cubic root of 42355218 is about 348.5798728294.

It can be divided in two parts, 4235 and 5218, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 42355218 in words is "forty-two million, three hundred fifty-five thousand, two hundred eighteen".