3217321380 has 144 divisors (see below), whose sum is σ = 11285507520. Its totient is φ = 678811392.

The previous prime is 3217321369. The next prime is 3217321399. The reversal of 3217321380 is 831237123.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3870 + ... + 80309.

It is an arithmetic number, because the mean of its divisors is an integer number (78371580).

Almost surely, 2^3217321380 is an apocalyptic number.

3217321380 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3217321380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5642753760).

3217321380 is an abundant number, since it is smaller than the sum of its proper divisors (8068186140).

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

3217321380 is a wasteful number, since it uses less digits than its factorization.

3217321380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84218 (or 84209 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 3217321380 is about 56721.4366884338. The cubic root of 3217321380 is about 1476.2666709953.

The spelling of 3217321380 in words is "three billion, two hundred seventeen million, three hundred twenty-one thousand, three hundred eighty".