352221816 has 128 divisors (see below), whose sum is σ = 958003200. Its totient is φ = 107627520.

The previous prime is 352221809. The next prime is 352221847. The reversal of 352221816 is 618122253.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1787830 + ... + 1788026.

It is an arithmetic number, because the mean of its divisors is an integer number (7484400).

Almost surely, 2^352221816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 352221816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (479001600).

352221816 is an abundant number, since it is smaller than the sum of its proper divisors (605781384).

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

352221816 is a wasteful number, since it uses less digits than its factorization.

352221816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 345 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 352221816 is about 18767.5735245662. The cubic root of 352221816 is about 706.2179479959.

The spelling of 352221816 in words is "three hundred fifty-two million, two hundred twenty-one thousand, eight hundred sixteen".