3213444221 has 8 divisors (see below), whose sum is σ = 3572265984. Its totient is φ = 2870570160.

The previous prime is 3213444187. The next prime is 3213444233. The reversal of 3213444221 is 1224443123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3213444221 is a prime.

It is a super-2 number, since 2×3213444221² = 20652447522956593682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213444251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3986501 + ... + 3987306.

It is an arithmetic number, because the mean of its divisors is an integer number (446533248).

Almost surely, 2^3213444221 is an apocalyptic number.

3213444221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3213444221 is a deficient number, since it is larger than the sum of its proper divisors (358821763).

3213444221 is a wasteful number, since it uses less digits than its factorization.

3213444221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7973851.

The product of its digits is 4608, while the sum is 26.

The square root of 3213444221 is about 56687.2491923889. The cubic root of 3213444221 is about 1475.6734216561.

Adding to 3213444221 its reverse (1224443123), we get a palindrome (4437887344).

The spelling of 3213444221 in words is "three billion, two hundred thirteen million, four hundred forty-four thousand, two hundred twenty-one".