53445220 has 24 divisors (see below), whose sum is σ = 112412664. Its totient is φ = 21344256.

The previous prime is 53445199. The next prime is 53445221. The reversal of 53445220 is 2254435.

It can be written as a sum of positive squares in 4 ways, for example, as 3968064 + 49477156 = 1992^2 + 7034^2 .

It is not an unprimeable number, because it can be changed into a prime (53445221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13732 + ... + 17188.

It is an arithmetic number, because the mean of its divisors is an integer number (4683861).

Almost surely, 2^53445220 is an apocalyptic number.

It is an amenable number.

53445220 is an abundant number, since it is smaller than the sum of its proper divisors (58967444).

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

53445220 is a wasteful number, since it uses less digits than its factorization.

53445220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4239 (or 4237 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 53445220 is about 7310.6237763956. The cubic root of 53445220 is about 376.6774511579.

Adding to 53445220 its reverse (2254435), we get a palindrome (55699655).

It can be divided in two parts, 534 and 45220, that added together give a palindrome (45754).

The spelling of 53445220 in words is "fifty-three million, four hundred forty-five thousand, two hundred twenty".