52521212040 has 128 divisors (see below), whose sum is σ = 173556864000. Its totient is φ = 12608766720.

The previous prime is 52521212039. The next prime is 52521212129. The reversal of 52521212040 is 4021212525.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 52521212040.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57190 + ... + 329109.

It is an arithmetic number, because the mean of its divisors is an integer number (1355913000).

Almost surely, 2^52521212040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52521212040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86778432000).

52521212040 is an abundant number, since it is smaller than the sum of its proper divisors (121035651960).

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

52521212040 is a wasteful number, since it uses less digits than its factorization.

52521212040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386427 (or 386423 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 52521212040 its reverse (4021212525), we get a palindrome (56542424565).

The spelling of 52521212040 in words is "fifty-two billion, five hundred twenty-one million, two hundred twelve thousand, forty".