3216826221 has 16 divisors (see below), whose sum is σ = 4904692224. Its totient is φ = 1837113264.

The previous prime is 3216826169. The next prime is 3216826273. The reversal of 3216826221 is 1226286123.

It is an interprime number because it is at equal distance from previous prime (3216826169) and next prime (3216826273).

It is not a de Polignac number, because 3216826221 - 2¹⁰ = 3216825197 is a prime.

It is a super-2 number, since 2×3216826221² = 20695941872226281682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3216826021) 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, 7155 + ... + 80528.

It is an arithmetic number, because the mean of its divisors is an integer number (306543264).

Almost surely, 2^3216826221 is an apocalyptic number.

It is an amenable number.

3216826221 is a deficient number, since it is larger than the sum of its proper divisors (1687866003).

3216826221 is a wasteful number, since it uses less digits than its factorization.

3216826221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89440.

The product of its digits is 13824, while the sum is 33.

The square root of 3216826221 is about 56717.0716892189. The cubic root of 3216826221 is about 1476.1909326045.

The spelling of 3216826221 in words is "three billion, two hundred sixteen million, eight hundred twenty-six thousand, two hundred twenty-one".