53221448 has 48 divisors (see below), whose sum is σ = 121150080. Its totient is φ = 21813792.

The previous prime is 53221417. The next prime is 53221477. The reversal of 53221448 is 84412235.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 53221448.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6065 + ... + 11967.

It is an arithmetic number, because the mean of its divisors is an integer number (2523960).

Almost surely, 2^53221448 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 53221448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60575040).

53221448 is an abundant number, since it is smaller than the sum of its proper divisors (67928632).

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

53221448 is a wasteful number, since it uses less digits than its factorization.

53221448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5946 (or 5935 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 53221448 is about 7295.3031465457. The cubic root of 53221448 is about 376.1510069476.

The spelling of 53221448 in words is "fifty-three million, two hundred twenty-one thousand, four hundred forty-eight".