53217280 has 48 divisors (see below), whose sum is σ = 127714860. Its totient is φ = 21282816.

The previous prime is 53217277. The next prime is 53217299. The reversal of 53217280 is 8271235.

It can be written as a sum of positive squares in 2 ways, for example, as 52765696 + 451584 = 7264^2 + 672^2 .

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, 7642 + ... + 12838.

Almost surely, 2^53217280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53217280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63857430).

53217280 is an abundant number, since it is smaller than the sum of its proper divisors (74497580).

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

53217280 is an equidigital number, since it uses as much as digits as its factorization.

53217280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5224 (or 5204 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 53217280 is about 7295.0174777035. The cubic root of 53217280 is about 376.1411873580.

The spelling of 53217280 in words is "fifty-three million, two hundred seventeen thousand, two hundred eighty".