53303220 has 36 divisors (see below), whose sum is σ = 161686980. Its totient is φ = 14214144.

The previous prime is 53303209. The next prime is 53303249. The reversal of 53303220 is 2230335.

It can be written as a sum of positive squares in 2 ways, for example, as 8225424 + 45077796 = 2868^2 + 6714^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 53303193 and 53303202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147885 + ... + 148244.

It is an arithmetic number, because the mean of its divisors is an integer number (4491305).

Almost surely, 2^53303220 is an apocalyptic number.

It is an amenable number.

53303220 is an abundant number, since it is smaller than the sum of its proper divisors (108383760).

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

53303220 is a wasteful number, since it uses less digits than its factorization.

53303220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296144 (or 296139 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 18.

The square root of 53303220 is about 7300.9054233020. The cubic root of 53303220 is about 376.3435538857.

Adding to 53303220 its reverse (2230335), we get a palindrome (55533555).

The spelling of 53303220 in words is "fifty-three million, three hundred three thousand, two hundred twenty".