533221668 has 72 divisors (see below), whose sum is σ = 1549154880. Its totient is φ = 151485120.

The previous prime is 533221651. The next prime is 533221693. The reversal of 533221668 is 866122335.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39198 + ... + 51018.

It is an arithmetic number, because the mean of its divisors is an integer number (21516040).

Almost surely, 2^533221668 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 533221668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (774577440).

533221668 is an abundant number, since it is smaller than the sum of its proper divisors (1015933212).

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

533221668 is a wasteful number, since it uses less digits than its factorization.

533221668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12017 (or 12012 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 533221668 is about 23091.5930156410. The cubic root of 533221668 is about 810.9036645332.

It can be divided in two parts, 5332 and 21668, that added together give a cube (27000 = 30³).

The spelling of 533221668 in words is "five hundred thirty-three million, two hundred twenty-one thousand, six hundred sixty-eight".