53543420 has 48 divisors (see below), whose sum is σ = 129275328. Its totient is φ = 18247680.

The previous prime is 53543419. The next prime is 53543423. The reversal of 53543420 is 2434535.

It is a self number, because there is not a number n which added to its sum of digits gives 53543420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53543423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24284 + ... + 26396.

It is an arithmetic number, because the mean of its divisors is an integer number (2693236).

Almost surely, 2^53543420 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 53543420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64637664).

53543420 is an abundant number, since it is smaller than the sum of its proper divisors (75731908).

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

53543420 is a wasteful number, since it uses less digits than its factorization.

53543420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310 (or 2308 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 53543420 is about 7317.3369472780. The cubic root of 53543420 is about 376.9080118072.

Adding to 53543420 its reverse (2434535), we get a palindrome (55977955).

The spelling of 53543420 in words is "fifty-three million, five hundred forty-three thousand, four hundred twenty".