53512220 has 24 divisors (see below), whose sum is σ = 113190000. Its totient is φ = 21249792.

The previous prime is 53512219. The next prime is 53512223. The reversal of 53512220 is 2221535.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 53512192 and 53512201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53512223) 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, 6845 + ... + 12404.

It is an arithmetic number, because the mean of its divisors is an integer number (4716250).

Almost surely, 2^53512220 is an apocalyptic number.

It is an amenable number.

53512220 is an abundant number, since it is smaller than the sum of its proper divisors (59677780).

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

53512220 is a wasteful number, since it uses less digits than its factorization.

53512220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19397 (or 19395 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 53512220 is about 7315.2047134718. The cubic root of 53512220 is about 376.8347888988.

Adding to 53512220 its reverse (2221535), we get a palindrome (55733755).

The spelling of 53512220 in words is "fifty-three million, five hundred twelve thousand, two hundred twenty".