821536334 has 4 divisors (see below), whose sum is σ = 1232304504. Its totient is φ = 410768166.

The previous prime is 821536283. The next prime is 821536351. The reversal of 821536334 is 433635128.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 821536294 and 821536303.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 205384082 + ... + 205384085.

It is an arithmetic number, because the mean of its divisors is an integer number (308076126).

Almost surely, 2^821536334 is an apocalyptic number.

821536334 is a deficient number, since it is larger than the sum of its proper divisors (410768170).

821536334 is a wasteful number, since it uses less digits than its factorization.

821536334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410768169.

The product of its digits is 51840, while the sum is 35.

The square root of 821536334 is about 28662.4551286173. The cubic root of 821536334 is about 936.5743478341.

The spelling of 821536334 in words is "eight hundred twenty-one million, five hundred thirty-six thousand, three hundred thirty-four".