52055231440 has 20 divisors (see below), whose sum is σ = 121028413284. Its totient is φ = 20822092544.

The previous prime is 52055231407. The next prime is 52055231447. The reversal of 52055231440 is 4413255025.

It can be written as a sum of positive squares in 2 ways, for example, as 13157925264 + 38897306176 = 114708^2 + 197224^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52055231447) 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, 325345117 + ... + 325345276.

Almost surely, 2^52055231440 is an apocalyptic number.

It is an amenable number.

52055231440 is an abundant number, since it is smaller than the sum of its proper divisors (68973181844).

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

52055231440 is a wasteful number, since it uses less digits than its factorization.

52055231440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650690406 (or 650690400 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 52055231440 its reverse (4413255025), we get a palindrome (56468486465).

The spelling of 52055231440 in words is "fifty-two billion, fifty-five million, two hundred thirty-one thousand, four hundred forty".