521422242 has 16 divisors (see below), whose sum is σ = 1137648672. Its totient is φ = 158006720.

The previous prime is 521422219. The next prime is 521422243. The reversal of 521422242 is 242224125.

It is a super-3 number, since 3×521422242³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (521422243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3950103 + ... + 3950234.

It is an arithmetic number, because the mean of its divisors is an integer number (71103042).

Almost surely, 2^521422242 is an apocalyptic number.

521422242 is an abundant number, since it is smaller than the sum of its proper divisors (616226430).

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

521422242 is a wasteful number, since it uses less digits than its factorization.

521422242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7900353.

The product of its digits is 2560, while the sum is 24.

The square root of 521422242 is about 22834.6719266995. The cubic root of 521422242 is about 804.8776183181.

Adding to 521422242 its reverse (242224125), we get a palindrome (763646367).

The spelling of 521422242 in words is "five hundred twenty-one million, four hundred twenty-two thousand, two hundred forty-two".