321955345 has 8 divisors (see below), whose sum is σ = 386447400. Its totient is φ = 257496960.

The previous prime is 321955339. The next prime is 321955349. The reversal of 321955345 is 543559123.

It can be written as a sum of positive squares in 4 ways, for example, as 16265089 + 305690256 = 4033^2 + 17484^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 321955345 - 2⁵ = 321955313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321955349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23931 + ... + 34879.

It is an arithmetic number, because the mean of its divisors is an integer number (48305925).

Almost surely, 2^321955345 is an apocalyptic number.

It is an amenable number.

321955345 is a deficient number, since it is larger than the sum of its proper divisors (64492055).

321955345 is a wasteful number, since it uses less digits than its factorization.

321955345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16835.

The product of its digits is 81000, while the sum is 37.

The square root of 321955345 is about 17943.1141388556. The cubic root of 321955345 is about 685.3807143596.

It can be divided in two parts, 3219 and 55345, that added together give a square (58564 = 242²).

The spelling of 321955345 in words is "three hundred twenty-one million, nine hundred fifty-five thousand, three hundred forty-five".