53821332 has 72 divisors (see below), whose sum is σ = 145367040. Its totient is φ = 16752960.

The previous prime is 53821309. The next prime is 53821343. The reversal of 53821332 is 23312835.

It is a junction number, because it is equal to n+sod(n) for n = 53821296 and 53821305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31533 + ... + 33195.

Almost surely, 2^53821332 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 53821332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72683520).

53821332 is an abundant number, since it is smaller than the sum of its proper divisors (91545708).

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

53821332 is a wasteful number, since it uses less digits than its factorization.

53821332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733 (or 1728 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 53821332 is about 7336.3023383718. The cubic root of 53821332 is about 377.5589884867.

The spelling of 53821332 in words is "fifty-three million, eight hundred twenty-one thousand, three hundred thirty-two".