3221421231 has 16 divisors (see below), whose sum is σ = 4911776000. Its totient is φ = 1839708288.

The previous prime is 3221421227. The next prime is 3221421251. The reversal of 3221421231 is 1321241223.

It is not a de Polignac number, because 3221421231 - 2² = 3221421227 is a prime.

It is a super-2 number, since 2×3221421231² = 20755109495075110722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3221421198 and 3221421207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221421221) 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, 9466 + ... + 80823.

It is an arithmetic number, because the mean of its divisors is an integer number (306986000).

Almost surely, 2^3221421231 is an apocalyptic number.

3221421231 is a deficient number, since it is larger than the sum of its proper divisors (1690354769).

3221421231 is a wasteful number, since it uses less digits than its factorization.

3221421231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91998.

The product of its digits is 576, while the sum is 21.

The square root of 3221421231 is about 56757.5654076177. The cubic root of 3221421231 is about 1476.8934765053.

Adding to 3221421231 its reverse (1321241223), we get a palindrome (4542662454).

The spelling of 3221421231 in words is "three billion, two hundred twenty-one million, four hundred twenty-one thousand, two hundred thirty-one".