321480645 has 16 divisors (see below), whose sum is σ = 515063232. Its totient is φ = 171224960.

The previous prime is 321480619. The next prime is 321480647. The reversal of 321480645 is 546084123.

It is not a de Polignac number, because 321480645 - 2¹⁰ = 321479621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321480647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2667 + ... + 25496.

It is an arithmetic number, because the mean of its divisors is an integer number (32191452).

Almost surely, 2^321480645 is an apocalyptic number.

It is an amenable number.

321480645 is a deficient number, since it is larger than the sum of its proper divisors (193582587).

321480645 is a wasteful number, since it uses less digits than its factorization.

321480645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28932.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 321480645 is about 17929.8813437234. The cubic root of 321480645 is about 685.0437004816.

The spelling of 321480645 in words is "three hundred twenty-one million, four hundred eighty thousand, six hundred forty-five".