322781923321 has 81 divisors (see below), whose sum is σ = 400814578983. Its totient is φ = 259616797440.

The previous prime is 322781923307. The next prime is 322781923369. The reversal of 322781923321 is 123329187223.

It is a happy number.

The square root of 322781923321 is 568139.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 246672148921 + 76109774400 = 496661^2 + 275880^2 .

It is not a de Polignac number, because 322781923321 - 2¹³ = 322781915129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (322781923391) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2356072365 + ... + 2356072501.

Almost surely, 2^322781923321 is an apocalyptic number.

322781923321 is the 568139-th square number.

322781923321 is the 284070-th centered octagonal number.

It is an amenable number.

322781923321 is a deficient number, since it is larger than the sum of its proper divisors (78032655662).

322781923321 is a wasteful number, since it uses less digits than its factorization.

322781923321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 190 counting only the distinct ones).

The product of its digits is 217728, while the sum is 43.

The spelling of 322781923321 in words is "three hundred twenty-two billion, seven hundred eighty-one million, nine hundred twenty-three thousand, three hundred twenty-one".