53155220 has 12 divisors (see below), whose sum is σ = 111626004. Its totient is φ = 21262080.

The previous prime is 53155213. The next prime is 53155241. The reversal of 53155220 is 2255135.

It can be written as a sum of positive squares in 2 ways, for example, as 13060996 + 40094224 = 3614^2 + 6332^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1328861 + ... + 1328900.

It is an arithmetic number, because the mean of its divisors is an integer number (9302167).

Almost surely, 2^53155220 is an apocalyptic number.

It is an amenable number.

53155220 is an abundant number, since it is smaller than the sum of its proper divisors (58470784).

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

53155220 is a wasteful number, since it uses less digits than its factorization.

53155220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657770 (or 2657768 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 53155220 is about 7290.7626487220. The cubic root of 53155220 is about 375.9949165602.

The spelling of 53155220 in words is "fifty-three million, one hundred fifty-five thousand, two hundred twenty".