821335332 has 48 divisors (see below), whose sum is σ = 1985155200. Its totient is φ = 263988480.

The previous prime is 821335309. The next prime is 821335369. The reversal of 821335332 is 233533128.

It is a self number, because there is not a number n which added to its sum of digits gives 821335332.

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 15 ways as a sum of consecutive naturals, for example, 447657 + ... + 449487.

It is an arithmetic number, because the mean of its divisors is an integer number (41357400).

Almost surely, 2^821335332 is an apocalyptic number.

It is an amenable number.

821335332 is an abundant number, since it is smaller than the sum of its proper divisors (1163819868).

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

821335332 is a wasteful number, since it uses less digits than its factorization.

821335332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3156 (or 3154 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

The square root of 821335332 is about 28658.9485501475. The cubic root of 821335332 is about 936.4979589741.

The spelling of 821335332 in words is "eight hundred twenty-one million, three hundred thirty-five thousand, three hundred thirty-two".