442215218 has 8 divisors (see below), whose sum is σ = 666988140. Its totient is φ = 219885840.

The previous prime is 442215187. The next prime is 442215223. The reversal of 442215218 is 812512244.

It can be written as a sum of positive squares in 2 ways, for example, as 436517449 + 5697769 = 20893^2 + 2387^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610433 + ... + 611156.

Almost surely, 2^442215218 is an apocalyptic number.

442215218 is a deficient number, since it is larger than the sum of its proper divisors (224772922).

442215218 is a wasteful number, since it uses less digits than its factorization.

442215218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221772.

The product of its digits is 5120, while the sum is 29.

The square root of 442215218 is about 21028.9138568781. The cubic root of 442215218 is about 761.8647755489.

The spelling of 442215218 in words is "four hundred forty-two million, two hundred fifteen thousand, two hundred eighteen".