53403220 has 24 divisors (see below), whose sum is σ = 120774024. Its totient is φ = 19718016.

The previous prime is 53403199. The next prime is 53403227. The reversal of 53403220 is 2230435.

It can be written as a sum of positive squares in 4 ways, for example, as 898704 + 52504516 = 948^2 + 7246^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53403227) 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, 102439 + ... + 102958.

It is an arithmetic number, because the mean of its divisors is an integer number (5032251).

Almost surely, 2^53403220 is an apocalyptic number.

It is an amenable number.

53403220 is an abundant number, since it is smaller than the sum of its proper divisors (67370804).

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

53403220 is a wasteful number, since it uses less digits than its factorization.

53403220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205419 (or 205417 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 53403220 is about 7307.7506799288. The cubic root of 53403220 is about 376.5787544679.

Adding to 53403220 its reverse (2230435), we get a palindrome (55633655).

The spelling of 53403220 in words is "fifty-three million, four hundred three thousand, two hundred twenty".