52420521443240 has 16 divisors (see below), whose sum is σ = 117946173247380. Its totient is φ = 20968208577280.

The previous prime is 52420521443203. The next prime is 52420521443243. The reversal of 52420521443240 is 4234412502425.

It can be written as a sum of positive squares in 2 ways, for example, as 46621392816196 + 5799128627044 = 6827986^2 + 2408138^2 .

It is a super-2 number, since 2×52420521443240² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 52420521443194 and 52420521443203.

It is not an unprimeable number, because it can be changed into a prime (52420521443243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655256518001 + ... + 655256518080.

Almost surely, 2^{52420521443240} is an apocalyptic number.

It is an amenable number.

52420521443240 is an abundant number, since it is smaller than the sum of its proper divisors (65525651804140).

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

52420521443240 is a wasteful number, since it uses less digits than its factorization.

52420521443240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310513036092 (or 1310513036088 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 38.

Adding to 52420521443240 its reverse (4234412502425), we get a palindrome (56654933945665).

The spelling of 52420521443240 in words is "fifty-two trillion, four hundred twenty billion, five hundred twenty-one million, four hundred forty-three thousand, two hundred forty".