321989225 has 6 divisors (see below), whose sum is σ = 399266670. Its totient is φ = 257591360.

The previous prime is 321989221. The next prime is 321989243. The reversal of 321989225 is 522989123.

It can be written as a sum of positive squares in 3 ways, for example, as 22733824 + 299255401 = 4768^2 + 17299^2 .

It is not a de Polignac number, because 321989225 - 2² = 321989221 is a prime.

It is a super-2 number, since 2×321989225² = 207354122032201250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321989221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6439760 + ... + 6439809.

It is an arithmetic number, because the mean of its divisors is an integer number (66544445).

Almost surely, 2^321989225 is an apocalyptic number.

It is an amenable number.

321989225 is a deficient number, since it is larger than the sum of its proper divisors (77277445).

321989225 is a wasteful number, since it uses less digits than its factorization.

321989225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12879579 (or 12879574 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 321989225 is about 17944.0582087776. The cubic root of 321989225 is about 685.4047548406.

The spelling of 321989225 in words is "three hundred twenty-one million, nine hundred eighty-nine thousand, two hundred twenty-five".