328236827221 has 2 divisors, whose sum is σ = 328236827222. Its totient is φ = 328236827220.

The previous prime is 328236827183. The next prime is 328236827263. The reversal of 328236827221 is 122728632823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289815339025 + 38421488196 = 538345^2 + 196014^2 .

It is a cyclic number.

It is not a de Polignac number, because 328236827221 - 2³⁵ = 293877088853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328236827921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164118413610 + 164118413611.

It is an arithmetic number, because the mean of its divisors is an integer number (164118413611).

Almost surely, 2^328236827221 is an apocalyptic number.

It is an amenable number.

328236827221 is a deficient number, since it is larger than the sum of its proper divisors (1).

328236827221 is an equidigital number, since it uses as much as digits as its factorization.

328236827221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 46.

The spelling of 328236827221 in words is "three hundred twenty-eight billion, two hundred thirty-six million, eight hundred twenty-seven thousand, two hundred twenty-one".