3231221231 has 16 divisors (see below), whose sum is σ = 3719439360. Its totient is φ = 2749710240.

The previous prime is 3231221219. The next prime is 3231221243. The reversal of 3231221231 is 1321221323.

It is an interprime number because it is at equal distance from previous prime (3231221219) and next prime (3231221243).

It is a cyclic number.

It is not a de Polignac number, because 3231221231 - 2³⁰ = 2157479407 is a prime.

It is a super-2 number, since 2×3231221231² = 20881581287330310722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231221131) 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, 909200 + ... + 912746.

It is an arithmetic number, because the mean of its divisors is an integer number (232464960).

Almost surely, 2^3231221231 is an apocalyptic number.

3231221231 is a deficient number, since it is larger than the sum of its proper divisors (488218129).

3231221231 is a wasteful number, since it uses less digits than its factorization.

3231221231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454.

The product of its digits is 432, while the sum is 20.

The square root of 3231221231 is about 56843.8319521124. The cubic root of 3231221231 is about 1478.3895971043.

Adding to 3231221231 its reverse (1321221323), we get a palindrome (4552442554).

The spelling of 3231221231 in words is "three billion, two hundred thirty-one million, two hundred twenty-one thousand, two hundred thirty-one".