321947316 has 18 divisors (see below), whose sum is σ = 813811362. Its totient is φ = 107315760.

The previous prime is 321947287. The next prime is 321947333. The reversal of 321947316 is 613749123.

321947316 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 163942416 + 158004900 = 12804^2 + 12570^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 8942981 = 321947316 / (3 + 2 + 1 + 9 + 4 + 7 + 3 + 1 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4471455 + ... + 4471526.

Almost surely, 2^321947316 is an apocalyptic number.

321947316 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

321947316 is an abundant number, since it is smaller than the sum of its proper divisors (491864046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321947316 is a wasteful number, since it uses less digits than its factorization.

321947316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8942991 (or 8942986 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 321947316 is about 17942.8904026079. The cubic root of 321947316 is about 685.3750169157.

The spelling of 321947316 in words is "three hundred twenty-one million, nine hundred forty-seven thousand, three hundred sixteen".