53221168 has 80 divisors (see below), whose sum is σ = 138491136. Its totient is φ = 19134720.

The previous prime is 53221151. The next prime is 53221171. The reversal of 53221168 is 86112235.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 14355 + ... + 17677.

Almost surely, 2^53221168 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 53221168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69245568).

53221168 is an abundant number, since it is smaller than the sum of its proper divisors (85269968).

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

53221168 is a wasteful number, since it uses less digits than its factorization.

53221168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362 (or 3356 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 53221168 is about 7295.2839560911. The cubic root of 53221168 is about 376.1503472983.

The spelling of 53221168 in words is "fifty-three million, two hundred twenty-one thousand, one hundred sixty-eight".