52400220 has 96 divisors (see below), whose sum is σ = 151656960. Its totient is φ = 13512960.

The previous prime is 52400219. The next prime is 52400267. The reversal of 52400220 is 2200425.

52400220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 52400220.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 376911 + ... + 377049.

It is an arithmetic number, because the mean of its divisors is an integer number (1579760).

Almost surely, 2^52400220 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 52400220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75828480).

52400220 is an abundant number, since it is smaller than the sum of its proper divisors (99256740).

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

52400220 is a wasteful number, since it uses less digits than its factorization.

52400220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 52400220 is about 7238.7996242471. The cubic root of 52400220 is about 374.2062499700.

Adding to 52400220 its reverse (2200425), we get a palindrome (54600645).

The spelling of 52400220 in words is "fifty-two million, four hundred thousand, two hundred twenty".