53550220 has 24 divisors (see below), whose sum is σ = 113135904. Its totient is φ = 21290496.

The previous prime is 53550209. The next prime is 53550241. The reversal of 53550220 is 2205535.

53550220 = T₃₉₁ + T₃₉₂ + ... + T₇₂₄.

It is a junction number, because it is equal to n+sod(n) for n = 53550191 and 53550200.

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, 4677 + ... + 11356.

It is an arithmetic number, because the mean of its divisors is an integer number (4713996).

Almost surely, 2^53550220 is an apocalyptic number.

It is an amenable number.

53550220 is an abundant number, since it is smaller than the sum of its proper divisors (59585684).

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

53550220 is a wasteful number, since it uses less digits than its factorization.

53550220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16209 (or 16207 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 53550220 is about 7317.8015824426. The cubic root of 53550220 is about 376.9239668707.

Adding to 53550220 its reverse (2205535), we get a palindrome (55755755).

The spelling of 53550220 in words is "fifty-three million, five hundred fifty thousand, two hundred twenty".