53011220 has 24 divisors (see below), whose sum is σ = 112077000. Its totient is φ = 21060992.

The previous prime is 53011201. The next prime is 53011241. The reversal of 53011220 is 2211035.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8868484 + 44142736 = 2978^2 + 6644^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53011195 and 53011204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5915 + ... + 11874.

It is an arithmetic number, because the mean of its divisors is an integer number (4669875).

Almost surely, 2^53011220 is an apocalyptic number.

It is an amenable number.

53011220 is an abundant number, since it is smaller than the sum of its proper divisors (59065780).

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

53011220 is a wasteful number, since it uses less digits than its factorization.

53011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17947 (or 17945 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 53011220 is about 7280.8804412653. The cubic root of 53011220 is about 375.6550801721.

Adding to 53011220 its reverse (2211035), we get a palindrome (55222255).

The spelling of 53011220 in words is "fifty-three million, eleven thousand, two hundred twenty".