821326325 has 6 divisors (see below), whose sum is σ = 1018444674. Its totient is φ = 657061040.

The previous prime is 821326301. The next prime is 821326327. The reversal of 821326325 is 523623128.

It can be written as a sum of positive squares in 3 ways, for example, as 38613796 + 782712529 = 6214^2 + 27977^2 .

It is not a de Polignac number, because 821326325 - 2²⁸ = 552890869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 821326291 and 821326300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821326327) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 16426502 + ... + 16426551.

It is an arithmetic number, because the mean of its divisors is an integer number (169740779).

Almost surely, 2^821326325 is an apocalyptic number.

It is an amenable number.

821326325 is a deficient number, since it is larger than the sum of its proper divisors (197118349).

821326325 is a wasteful number, since it uses less digits than its factorization.

821326325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32853063 (or 32853058 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 821326325 is about 28658.7914085713. The cubic root of 821326325 is about 936.4945356594.

The spelling of 821326325 in words is "eight hundred twenty-one million, three hundred twenty-six thousand, three hundred twenty-five".