442521210 has 64 divisors (see below), whose sum is σ = 1120665600. Its totient is φ = 111523392.

The previous prime is 442521193. The next prime is 442521217. The reversal of 442521210 is 12125244.

It is not an unprimeable number, because it can be changed into a prime (442521217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 345351 + ... + 346629.

It is an arithmetic number, because the mean of its divisors is an integer number (17510400).

Almost surely, 2^442521210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442521210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (560332800).

442521210 is an abundant number, since it is smaller than the sum of its proper divisors (678144390).

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

442521210 is a wasteful number, since it uses less digits than its factorization.

442521210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 442521210 is about 21036.1881052628. The cubic root of 442521210 is about 762.0404598215.

Adding to 442521210 its reverse (12125244), we get a palindrome (454646454).

The spelling of 442521210 in words is "four hundred forty-two million, five hundred twenty-one thousand, two hundred ten".