65520215434242 has 48 divisors (see below), whose sum is σ = 142308315185400. Its totient is φ = 21786564441600.

The previous prime is 65520215434231. The next prime is 65520215434277. The reversal of 65520215434242 is 24243451202556.

65520215434242 is a `hidden beast` number, since 6 + 5 + 5 + 2 + 0 + 21 + 543 + 42 + 42 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 41148132331761 + 24372083102481 = 6414681^2 + 4936809^2 .

It is a super-2 number, since 2×65520215434242² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103115392 + ... + 103748852.

Almost surely, 2^{65520215434242} is an apocalyptic number.

65520215434242 is an abundant number, since it is smaller than the sum of its proper divisors (76788099751158).

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

65520215434242 is a wasteful number, since it uses less digits than its factorization.

65520215434242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647539 (or 647536 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 45.

Adding to 65520215434242 its reverse (24243451202556), we get a palindrome (89763666636798).

The spelling of 65520215434242 in words is "sixty-five trillion, five hundred twenty billion, two hundred fifteen million, four hundred thirty-four thousand, two hundred forty-two".