821553482 has 8 divisors (see below), whose sum is σ = 1246176900. Its totient is φ = 406161184.

The previous prime is 821553479. The next prime is 821553511. The reversal of 821553482 is 284355128.

It can be written as a sum of positive squares in 2 ways, for example, as 611622361 + 209931121 = 24731^2 + 14489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2307557 + ... + 2307912.

Almost surely, 2^821553482 is an apocalyptic number.

821553482 is a deficient number, since it is larger than the sum of its proper divisors (424623418).

821553482 is a wasteful number, since it uses less digits than its factorization.

821553482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4615560.

The product of its digits is 76800, while the sum is 38.

The square root of 821553482 is about 28662.7542640270. The cubic root of 821553482 is about 936.5808641883.

The spelling of 821553482 in words is "eight hundred twenty-one million, five hundred fifty-three thousand, four hundred eighty-two".